Anatomy Review

Question 1

A 45-year-old former professional golfer, Tiger W., presents to your clinic with “elbow pain.” After examining the patient, you diagnose him with “Golfer’s Elbow.”

The superficial layer of muscles in the anterior forearm all originate at the 1. Each of the muscles in this superficial layer are innervated by the median nerve, except for the 2 muscle, which is innervated by the 3 nerve. While palpating the muscles of this superficial layer of the forearm, the patient reports a “pins and needles” tingling sensation in the first “three or so fingers” on the palmar aspect.

Which muscle of the superficial layer of the anterior forearm is a common entrapment site of the nerve that carries sensory input from the first three and a half digits (palmar aspect)? 4

Answer 1

1. Medial epicondyle of the humerus
   
   2. Flexor carpi ulnaris
   3. Ulnar nerve
   4. Pronator teres

Question 2

A first-year chiropractic student presents to your clinic with “shoulder pain, tingling, weakness.” Upon examination, you suspect two diagnoses contributing to the chief complaint.
• What nerve innervates the muscle that attaches at the medial border of the scapula and the first 8 or 9 ribs? 1
• What spinal nerve segments make up the nerve that is transmitted through the quadrangular space? 2
• What artery (and vein) is transmitted through the quadrangular space? 3
• What artery (and vein) is transmitted through the triangular space? 4

Answer 2

1. Long thoracic nerve
   
   2. C5, C6, C7
   3. Posterior circumflex humeral artery and vein
   4. Circumflex scapular artery and vein

Question 3

A major league baseball pitcher, Nestor C., presents to your clinic with “shoulder pain.”

Upon examination, you note pain rated 7/10 when the patient attempts to abduct the humerus.
• What muscle is responsible for the first 15-30 degrees of abduction of the humerus? 1
• What nerve innervates this muscle? 2
• What other muscle is innervated by this same nerve? 3
• Which of the rotator cuff muscles internally rotates the humerus? 4
• Which nerve(s) innervate the only internal rotator of the rotator cuff muscles? 5

Answer 3

1. Supraspinatus
   
   2. Suprascapular nerve
   3. Infraspinatus
   4. Subscapularis
   5. Upper and lower subscapular nerves

Question 4

A patient, Violet B., presents to your clinic with “puffy, swollen arms” bilaterally. To rule out diabetes, you draw blood.
• The most common site of venipuncture in the anterior elbow is the 1 vein.
• A week passes. The patient returns with noticeably swollen, almost purple arms. She’s been working on her doctoral thesis about greed, which involves her leaning over a desk, writing, and researching on her computer.
• Between the anterior and middle scalene muscles, what part of the brachial plexus would we find? 2
• The “thoracic outlet” (not “thoracic outlet syndrome”) is located between which two bones? 3
• The pectoralis minor inserts at the 4 and is innervated by a nerve that comes off which cord of the brachial plexus? 5
• Muscles of the anterior compartment of the arm are innervated by nerves that arise from which cord(s)? 6

Answer 4

1. Median cubital vein
   
   2. Trunks of the brachial plexus
   3. Clavicle and first rib
   4. Coracoid process
   5. Medial cord
   6. Lateral and medial cords

Question 5

An administrative assistant, Dolly P., presents to your clinic after working a grueling schedule of 9–5, five days a week. She complains of tingling in her fingers, loss of coordination in her hands, and loss of grip strength.
• Name the muscle/muscle tendons that pass through the carpal tunnel based on the following:
• 1 muscle flexes the first digit.
• 2 muscle flexes the proximal interphalangeal joint of digits 2–5.
• 3 muscle flexes the distal interphalangeal joint of digits 2–5.
• Which two carpals form the posterior border of the carpal tunnel? 4 (list these from proximal to distal).
• Which nerve(s) innervates opponens pollicis, abductor pollicis brevis, flexor pollicis brevis-superficial head? 5
• Which nerve innervates all the other muscles of the thenar and hypothenar eminence? 6

Answer 5

1. Flexor pollicis longus
   
   2. Flexor digitorum superficialis
   3. Flexor digitorum profundus
   4. Scaphoid, trapezium
   5. Recurrent branch of the median nerve
   6. Ulnar nerve

Question 6

An avid tennis player, Venus W., presents to your clinic with “elbow pain.” Upon examination, you notice tenderness at the distal lateral humerus.
• Extensors of the forearm attach via the common extensor tendon to the 1 of the humerus.
• All of the muscles in the posterior compartment are innervated by the 2 nerve, which is made of spinal nerve segments 3.
• Which muscle of the posterior forearm compartment inserts at the base of the second metacarpal? 4
• The deepest muscle that attaches at this same bony landmark, the 5, is a common entrapment site of the 6 nerve (be specific).
• The proximal ulna articulates at the 7 of the humerus.

Answer 6

1. Lateral epicondyle
2. Radial nerve
3. C5-T1
4. Extensor carpi radialis longus
5. Supinator
6. Posterior interosseous nerve (a branch of the radial nerve)
7. Trochlea

Question 7

• What type of synovial joint is found between the lateral carpal in the distal row and the first metacarpal? 1
• What ligament attaches at both the trapezoid line and the conoid tubercle? 2
• Which ligament, that helps prevent abduction of the elbow, is commonly injured in baseball pitchers and repaired with Tommy John surgery? 3

Answer 7

1. Saddle joint
   
   2. Coracoclavicular ligament
   3. Ulnar collateral ligament

Question 8

Name the three branches off the third part of the axillary artery.

Answer 8

1. Posterior circumflex humeral artery
2. Anterior circumflex humeral artery
3. Subscapular artery

Question 9

Rotator cuff injuries are common. Consider the muscles of the rotator cuff.

Answer 9

1. Supraspinatus (abducts the humerus)
2. Subscapularis (internally rotates the humerus)
3. Teres minor (innervated by axillary nerve)

Question 10

What part of the brachial plexus does each of the following emerge from?

Answer 10

1. Branch (Thoracodorsal nerve—innervates latissimus dorsi)
2. Trunk (Nerve to subclavius)
3. Trunk (Suprascapular nerve—travels through the suprascapular notch)

Question 11

Posterior ulnar recurrent artery is a continuation or anastomosis of which artery?

Answer 11

1. Ulnar artery

Question 12

“Nursemaid’s elbow” involves dislocation of the radial head.

Answer 12

1. Annular ligament
   
   2. Biceps brachii
   3. Musculocutaneous nerve

Question 13

The intercostal nerve, artery, and vein are found deep to the:

Answer 13

1. Internal intercostal muscle

Question 14

A patient presents with weak grip strength and a previous diagnosis of carpal tunnel syndrome.

Answer 14

1. Abductor pollicis brevis, flexor pollicis brevis (superficial head)
   
   2. Scaphoid and trapezium
   3. Flexor digitorum superficialis (4 tendons)
   4. Flexor digitorum profundus (4 tendons)
   5. Flexor pollicis longus (1 tendon)

Question 15

Name the muscle that attaches at the coracoid process and whose nerve emerges from the level of the cords of the brachial plexus.

Answer 15

1. Pectoralis minor

Question 16

A 72-year-old presents with wrist pain following a FOOSH injury.

Answer 16

1. Scaphoid
   
   2. Extensor pollicis longus, abductor pollicis longus

Question 17

Scapular anastomosis is supplied by:

Answer 17

1. Circumflex scapular artery
2. Dorsal scapular artery

Question 18

Venipuncture and veins of the upper extremity.

Answer 18

1. Median cubital vein
2. Cephalic vein
3. Basilic vein

Question 19

The most distal joint flexed by flexor digitorum superficialis:

Answer 19

1. Proximal interphalangeal (PIP) joint

Question 20

Common entrapment sites for nerves:

Answer 20

1. Radial nerve: Triangular interval
   
   2. Median nerve: Carpal tunnel
   3. Ulnar nerve: Cubital tunnel
   4. Posterior interosseous nerve: Supinator muscle
   5. Axillary nerve: Quadrangular space
   6. Brachial plexus: Scalene triangle

Question 21

Arteries and nerves of the forearm.

Answer 21

1. Common interosseous artery
   
   2. Ulnar artery
   3. Anterior interosseous nerve (branch of median nerve)
   4. Posterior interosseous nerve (branch of radial nerve)

Question 22

The muscle responsible for elbow flexion in mid-position with high repetition, low weight:

Answer 22

1. Brachioradialis

Question 23

Circulation of the hand.

Answer 23

1. Radial artery (deep palmar arch)
2. Ulnar artery (superficial palmar arch)
3. Princeps pollicis artery

Question 24

“Saturday night palsy” (Radial nerve compression from sleeping on a chair).

Answer 24

1. Posterior cord
2. Deep brachial artery
3. Brachialis and brachioradialis

Question 25

Ligaments of the upper extremity.

Answer 25

1. Transverse humeral ligament
   
   2. Conoid and trapezoid ligaments

Question 26

Insertion of latissimus dorsi:

Answer 26

1. Intertubercular sulcus (bicipital groove) of the humerus

Question 27

Nerve innervation of upper extremity muscles.

Answer 27

1. Dorsal scapular nerve (Rhomboid minor)
   
   2. Long thoracic nerve (Serratus anterior)
   3. Medial and lateral pectoral nerves (Pectoralis major)
   4. Axillary nerve (Deltoid)
   5. Musculocutaneous nerve (Coracobrachialis)
   6. Radial nerve (Extensor digiti minimi)
   7. Ulnar nerve (Flexor carpi ulnaris)
   8. Median nerve (Pronator teres)
   9. Median nerve (Opponens pollicis)
   10. Median and ulnar nerves (Flexor digitorum profundus—lateral two heads by median, medial two heads by ulnar)

Question 28

Spinal nerve segments of key nerves.

Answer 28

1. C5-C7 (Musculocutaneous nerve)
   
   2. C5-C6 (Axillary nerve)
   3. C5-T1 (Radial nerve)
   4. C5-T1 (Median nerve)
   5. C8-T1 (Ulnar nerve)
   6. C5 (Dorsal scapular nerve)
   7. C6-C8 (Thoracodorsal nerve)
   8. C5-C7 (Long thoracic nerve)

Question 29

In upper crossed syndrome, the muscle that attaches at the TPs of C1-C4 and the vertebral border of the scapula (superior to the root of spine of the scapula) is the _________.
The muscle that inserts on the floor of the bicipital groove is the _________.
This muscle is innervated by the _________ nerve.
This nerve is made up of spinal nerve segments _________.

Answer 29

1. Levator scapulae
2. Latissimus dorsi
3. Thoracodorsal nerve
4. C6-C8

Question 30

A 48yo mechanic presents to your clinic with pain and weakness 5 months in duration, rated 8/10 on the pain scale.
She notes tingling into the volar aspect of digits 1-3.

Which nerve is likely affected? _________
If this nerve was entrapped in the forearm, which muscle is likely entrapping it? _________

Answer 30

1. Median nerve
   
   2. Pronator teres

Question 31

The transverse cervical (cutaneous) nerve and the supraclavicular nerve arise from the _________ plexus.
The ansa cervicalis is made of which nerve segments? _________

Answer 31

1. Cervical plexus
   
   2. C1-C3

Question 32

The posterior interosseous nerve arises from the _________ nerve.
This runs parallel to the artery of the same name. The posterior interosseous artery is a direct branch from the common interosseous artery, which arises from the _________ artery.

Answer 32

1. Radial nerve
   
   2. Ulnar artery

Question 33

The very first branch off the first part of the axillary artery is the _________ artery.

Answer 33

1. Superior thoracic artery

Question 34

The anterior thumb shouldn’t be used to take a pulse from a patient because the _________ artery is large enough to have its own pulse.
This artery is a branch of the _________ arch.

Answer 34

1. Princeps pollicis artery
   
   2. Deep palmar arch

Question 35

“Nursemaid’s elbow” involves dislocation of the radial head.
The _________ ligament wraps around the proximal radius and helps hold it in place during pronation/supination.
The radial head articulates with the ulna at the _________ notch.

Answer 35

1. Annular ligament
   
   2. Radial notch of ulna

Question 36

After an anatomy exam, a student falls asleep with their arm over a chair for several hours.
They have a hard time pointing the index finger, turning their hand palm up, and extending their wrist until their arm “wakes up”.

The nerve involved develops from the _________ cord, travels with the _________ artery through the _________ (an anatomical space in the arm).

Answer 36

1. Posterior cord
   
   2. Deep brachial artery
   3. Triangular interval

Question 37

The name of the nerve that innervates the rhomboid minor: _________
Identify the nerve segments that innervate the muscle that attaches at the first 8-9 ribs: _________

Answer 37

1. Dorsal scapular nerve
   
   2. C5-C7 (Long thoracic nerve)

Question 38

The intercostal nerve, artery, and vein are found deep to the _________.

Answer 38

1. Internal intercostal muscle

Question 39

Muscles of the anterior forearm are generally innervated by the _________ nerve, which is made up of nerve segments _________, except for the ulnar two heads of the _________ and the _________ muscles, which are innervated by the _________ nerve, which is made up of spinal nerve segments _________.

Answer 39

1. Median nerve
   
   2. C5-T1
   3. Flexor digitorum profundus
   4. Flexor carpi ulnaris
   5. Ulnar nerve
   6. C8-T1

Question 40

A patient presents with weak grip strength, pins and needles sensation in the right hand, and a previous diagnosis of carpal tunnel syndrome.

The three intrinsic muscles of the hand affected are most likely: _________, _________, and _________.
The bones that form the posterior margin of the tunnel are the _________ and _________.
The tendons that are transmitted through the tunnel are:
• 4 tendons of _________
• 4 tendons of _________
• 1 tendon of _________

Answer 40

1. Flexor pollicis brevis
   
   2. Abductor pollicis brevis
   3. Opponens pollicis
   4. Scaphoid
   5. Trapezium
   6. Flexor digitorum superficialis
   7. Flexor digitorum profundus
   8. Flexor pollicis longus

Question 41

A patient presents with numbness across the deltoid/regimental patch.
After evaluation, you suspect _________ nerve entrapment at the _________ space.
The superior border of this space is the _________ muscle.
The artery that travels through this anatomical space is the _________.

Answer 41

1. Axillary nerve
   
   2. Quadrangular space
   3. Teres minor
   4. Posterior circumflex humeral artery

Question 42

Name the insertion of extensor carpi radialis brevis _________.

Answer 42

Base of the 3rd metacarpal

Question 43

• Thoracodorsal artery: _________ nerve
• Recurrent radial artery: _________ nerve
• Lateral thoracic artery: _________ nerve

Answer 43

1. Thoracodorsal nerve
   
   2. Radial nerve
   3. Long thoracic nerve

Question 44

Serratus posterior superior is innervated by intercostal nerves _________.

Answer 44

T2-T5

Question 45

Name the muscles that attach at the coracoid process and…
• Attaches at ribs 3-5: _________
• Crosses the shoulder and elbow: _________

Answer 45

1. Pectoralis minor
   
   2. Coracobrachialis

Question 46

The muscle that inserts most medially is innervated by which nerve(s)? _________
The muscle that inserts on the lesser tubercle of the humerus and is a rotator cuff muscle is the _________ muscle, innervated by the _________ nerve.

Answer 46

1. Medial and lateral pectoral nerves (Pectoralis major - sternal head)
2. Subscapularis
3. Upper and lower subscapular nerves

Question 47

Name the anatomical structure associated with each of the following conditions or symptoms:
• Golfer’s elbow: 1 (bony landmark)
• Tennis elbow: 2 (bony landmark)
• Carpal tunnel syndrome: 3 (nerve)
• Ulnar nerve palsy at the wrist: 4 (a tunnel)
• Loss of sensation of the middle finger: 5 (a dermatome)

Answer 47

1. Golfer’s elbow: Medial epicondyle
   
   2. Tennis elbow: Lateral epicondyle
   3. Carpal tunnel syndrome: Median nerve
   4. Ulnar nerve palsy at the wrist: Guyon’s canal
   5. Loss of sensation of the middle finger: C7 dermatome

Question 48

• The ligament that traverses the bicipital groove: 1
• The most lateral and distal carpal: 2
• The distal attachment of the muscle immediately deep to the brachioradialis: 3
• The muscle innervated by the lower subscapular nerve originates here: 4
• The nerve that innervates the muscle that attaches at the coracoid process and ribs 3–5: 5

Answer 48

1. Transverse humeral ligament
   
   2. Scaphoid
   3. Base of the second metacarpal (i.e., the insertion of extensor carpi radialis longus)
   4. Dorsal surface of the inferior angle of the scapula (origin of teres major)
   5. Medial pectoral nerve (which innervates pectoralis minor)

Question 49

Give the part of the brachial plexus (Roots, Trunks, Divisions, Cords, or Branches) that gives immediate origin to the following nerves:
(Example: [1] → ulnar nerve. Correct answer: cord. No additional detail needed… just the RTDCB)
• 1 → dorsal scapular nerve
• 2 → nerve to subclavius
• 3 → thoracodorsal nerve
• 4 → long thoracic nerve
• 5 → lower subscapular nerve

Answer 49

1. Dorsal scapular nerve: Root
   
   2. Nerve to subclavius: Trunk
   3. Thoracodorsal nerve: Cord
   4. Long thoracic nerve: Root
   5. Lower subscapular nerve: Cord

Question 50

A phlebotomist named Anna Stamosis is helping you study for your anatomy exam. Fill in the blank with the correct artery that completes the anastomosis!
• Profunda brachii – radial collateral – 1 – radial
• Brachial – 2 – posterior ulnar recurrent
• Radial – deep palmar arch – 3 – ulnar

Answer 50

1. Radial recurrent artery
   
   2. Inferior ulnar collateral artery
   3. Deep branch of the ulnar artery

Question 51

• The anatomical name for the shoulder joint (NOT ball-and-socket, that is a type of synovial joint…): 1
• The part of the humerus that articulates with the ulna: 2
• The name of the wedge-shaped cartilage between the distal ulna and the carpals: 3

Answer 51

1. Glenohumeral joint
   
   2. Trochlea
   3. Triangular fibrocartilage complex (TFCC)

Question 52

In upper cross syndrome:
• The muscle that inserts to the lateral clavicle, acromion, and spine of the scapula is the 1.
• The muscle that originates on the lateral clavicle, acromion, and spine of the scapula is innervated by the 2 nerve.
• The nerve that innervates this muscle is made of nerve segments 3.

A patient presents with scapular winging:
• The winging may be a result of injury to the 4 nerve.
• This nerve is comprised of spinal nerve segments 5.
• The muscle that is innervated by this nerve is the 6.
• The artery that runs with the nerve that innervates this muscle is the 7.

Answer 52

Upper Cross Syndrome:
1. Trapezius
2. Deltoid (which is innervated by the axillary nerve)
3. Axillary nerve segments: C5–C6

Scapular Winging:
4. Long thoracic nerve
5. Spinal segments C5–C7
6. Serratus anterior
7. Lateral thoracic artery

Question 53

Barry O. is learning how to take a pulse. The instructor says to avoid using his thumb. When Barry asks why, the instructor explains it is because the thumb has its own pulse which comes from the 1 artery, which is a branch off the 2 arch.

Linda B. presents to your clinic with a chief complaint of paresthesia on the lateral 3 and a half fingers and into her palm – name the nerve with this cutaneous distribution: 3. This nerve, made of spinal nerve segments 4, is suspected to be involved in your differential diagnosis. The nerve may be entrapped at the 5 at the wrist or near the elbow by the 6. If left untreated, which thenar muscles are likely to atrophy?
• Superficial head of 7
• 8 (opponens)
• 9

Answer 53

Pulse (Thumb):
1. Princeps pollicis artery
2. Deep palmar arch

Thenar Cutaneous Distribution:
3. Median nerve
4. Spinal segments C5–T1
5. Carpal tunnel
6. Pronator teres

Thenar Muscle Atrophy:
7. Flexor pollicis brevis (superficial head)
8. Opponens pollicis
9. Abductor pollicis brevis

Question 54

The deepest layer of the forearm is made up of three muscles.
• The muscle that inserts on the distal phalanx is the 1 muscle. This muscle is innervated by two nerves. The nerve that innervates the lateral part of this muscle is the 2 nerve. The nerve roots of this nerve are 3.
• The deepest muscle in the anterior forearm is the 4. This muscle is vascularized by the 5 artery.

A young patient presents with lateral elbow pain after his wrist was quickly pulled. What is the ligament likely involved in “Nurse‐maid’s Elbow”? 6.
Name the type of synovial joint at the humeroradial articulation: 7.

Answer 54

1. Flexor digitorum profundus
   
   2. Median nerve (via its anterior interosseous branch)
   3. C8–T1
   4. Flexor pollicis longus
   5. Anterior interosseous artery
   6. Annular ligament
   7. Hinge joint

Question 55

A 29‑year‑old crossfitter presents to your clinic…

Part A – Abduction and Radial Nerve Pathway:
• The muscle that abducts the arm the first 15–30° is the 1.
• The muscle that abducts the arm AFTER the first 30° inserts at the 2.
• The bony depression directly distal to this is the 3.
• The nerve segments that make up the nerve that runs through this landmark are 4.
• The 5 artery runs with this nerve.

Part B – Quadrangular Space:
• The rotator cuff muscle forming one border of the quadrangular space is the 6.
• The nerve transmitted through the quadrangular space is the 7.
• The artery transmitted through the quadrangular space is the 8.

Answer 55

Part A:
1. Supraspinatus
2. Deltoid (inserts on the deltoid tuberosity)
3. Spiral (radial) groove
4. Radial nerve segments: C5–T1
5. Deep brachial (profunda brachii) artery

Part B:
6. Teres minor
7. Axillary nerve
8. Posterior circumflex humeral artery

Question 56

A patient presents with weakness and loss of sensation on the posterior arm after a night of passing out with his arm hanging over a chair.
• The nerve most implicated is the 1.
• This nerve passes through an anatomical space known as the 2 along with the 3 artery.
• This nerve bifurcates into 4 (which passes deep to brachioradialis) and 5 (which passes deep to the supinator) in the forearm.

Answer 56

1. Radial nerve
   
   2. Spiral (radial) groove
   3. Deep brachial (profunda brachii) artery
   4. Superficial branch of the radial nerve
   5. Posterior interosseous nerve

Question 57

Of the branches off the axillary artery…. the artery that meets up with the long thoracic nerve : __1__ transmitted through the triangular space __2__ gives off pectoral, clavicular, acromial, and deltoid
branches __3__

Answer 57

1. Thoracoacromial artery – This artery meets up with the long thoracic nerve.
2. Triangular space – The thoracoacromial artery is transmitted through the triangular space.
3. Thoracoacromial artery gives off pectoral, clavicular, acromial, and deltoid branches.

Question 58

Rotator cuff injuries are common. Consider the muscles of the rotator cuff. most commonly injured __1__
Muscle/tendon its fascia is continuous with the transverse humeral ligament __2__
Shares the same actions as the rotator cuff muscle innervated by axillary nerve __3__

Answer 58

1. supraspinatus
2. subscapularis tendon
3. teres minor

Question 59

What part of the brachial plexus does each of the following emerge from? (name where in the brachial plexus the nerve comes from (i.e. “trunk” or “branch”)
the nerve that innervates the muscle that originates on ribs 3-5:
the nerve that innervates the muscle that attaches on the inferior clavicle and first rib:
the nerve that travels through arcade of Frohse

Answer 59

1. Nerve that innervates the muscle originating on ribs 3-5:
   • Muscle: Pectoralis minor
   • Nerve: Medial pectoral nerve
   • Origin in the brachial plexus: Medial cord (it branches off the medial cord).
   
   2. Nerve that innervates the muscle attaching to the inferior clavicle and first rib:
      • Muscle: Subclavius
      • Nerve: Nerve to subclavius
      • Origin in the brachial plexus: Superior trunk (it emerges from the superior trunk).
   3. Nerve that travels through the arcade of Frohse:
      • Nerve: Radial nerve
      • Origin in the brachial plexus: Posterior cord

Question 60

The flexor of the elbow that inserts on the radial tuberosity is the ______. This muscle is originates in the coracoid process and the _______. The nerve to this muscle arises from the cord/cords of the brachial plexus ______

Answer 60

1. Biceps brachii
2. supraglenoid tubercle of the scapula
3. lateral cord

Question 61

Consider ligaments of the upper extremity.
helps to hold the head of radius in the radial notch:
The ligament superifcial to the subdeltoid/subacromial bursa:

Answer 61

1. Helps to hold the head of the radius in the radial notch:
   • Ligament: Annular ligament of the radius
   • This ligament encircles the head of the radius and holds it in place against the radial notch of the ulna, allowing for the rotation of the radius during forearm pronation and supination.
   
   2. Superficial to the subdeltoid/subacromial bursa:
      • Ligament: Coracoacromial ligament
      • The coracoacromial ligament spans from the coracoid process to the acromion, and it is located superficial to the subdeltoid (or subacromial) bursa, which lies between the acromion and the head of the humerus.

Question 62

Prior to an anatomy exam, a student falls asleep with their arm over a chair for several hours. They have a hard time pointing the index finger, turning their hand palm up and extending their wrist until their arm “wakes up”.
The nerve involved develops from the __1__cord. At the distal lateral humerus, this nerve bifurcates in the ___2___ branch
that supplies cutaneous sensation from the posterior hand and the ___3___ branch which runs deep to the ___4___ muscle

Answer 62

1. Posterior
2. Superifcial
3. Deep
4. Brachioradialis

Question 63

A patient presents experiences syncope (fainting) following a routine chiropractic visit. You check for a pulse at the wrist towards the lateral distal forearm for the __1__ artery. You use your index and middle finger to check for the pulse, not the thumb because of the __2__ artery which branches from the __3__ palmar arch

Answer 63

1. Radial
2. Priceps Pollicis
3. Superficial

Question 64

The break in fascia halfway between the umbilicus and pubic symphysis that allows the muscle belly of rectus abdominis to pass deep to all contributions of the rectus sheath:

Answer 64

arcuate line

Question 65

The anterior and posterior interosseous arteries arise from the __1__ artery which is a direct branch of the __2__ artery. The anterior interosseous NERVE is a branch of the __3__ nerve. The posterior interosseous nerve is a branch of the __4__ nerve.

Answer 65

1. Common interosseous
2. Ulnar
3. Median
4. Radial

Question 66

Fill in the name of the nerve associated with the description or entrapment site: The space bordered by teres major, long head of triceps, and humerus: __1__ nerve

The space bordered by the hamate, pisiform, lunate, capitate, trapezium: __2__ nerve scapular notch and transverse scapular ligament: __3__ nerve

Between the posterior scalene and levator scapulae: __4__ nerve

Running with the posterior humeral circumflex artery: __5__ nerve

Between anterior and middle scalene: __6__

Answer 66

1. Axillary nerve
2. Ulnar nerve
3. Suprascapular
4. Dorsal Scapular
5. Axillary nerve
6. Brachial plexus (C5-C7 roots)

Question 67

An intrepid eryt An intrepid erythrocyte (red blood cell) is on its way to the subclavian vein after a tour of the upper extremity.
The most common site for venipuncture (blood draw) in the upper extremity: _________ The superficial vein that drains at the deltopectoral triangle: _________ The deep vein that runs parallel to the brachial artery: ___________

Answer 67

1. median cubital vein
2. deltopectoral triangle
3. Brachial vein

Question 68

The muscle of the spermaticord that is continuous with the internal oblique muscle and fascia:

Answer 68

Cremaster muscle

Question 69

A patient presents with weak grip strength, pins and needles sensation is the right hand and a previous diagnosis of carpal tunnel syndrome. In your evaluation, you note a decrease in the size of the thenar eminence on the R hand. The three instrinsic muscles of the hand affected are most likely affected are innervated by what nerve? ______

The structure that forms the anterior terior margin of the tunnel is the ___________ The tendons that are transmitted throught the tunnel are the (from superficial to deep): 4 tendons of __________ 4 tendons of __________ 1 tendon of ___________

Answer 69

1. Median
2. Flexor retinaculum
3. Flexor digitorum superificialis
4. Flexor digitorum profundus
5. Flexor pollicis longus

Question 70

Recurrent radial artery is a continuation or anatomosis of which artery in the arm?

Answer 70

Radial artery

Question 71

Provide the spinal nerve segments for the following nerves:
Musculocutaneous:
Axillary:
Radial:
Median:
Ulnar:
Suprascapular:
Thoracodorsal:
Long thoracic:

Answer 71

1: C5-C7
2: C5-C6
3: C5-T1
4: C5-T1
5: C8-T1
6: C5-C6
7: C6-C8
8: C5-C7

Question 72

Name the nerve(s) that provides motor innervation to the following muscles. If a muscle is innervated by more than one nerve, put both nerves in the answer space- Those items are “all of none” points.
Flexor digiti minimi :
Opponens pollicis :
Pectoralis minor :
Teres minor :
Biceps brachii, short head :
Extensor pollicis brevis:
Triceps brachii :
Trapezius :
Levator scapulae :
Flexor digitorum profundus :

Answer 72

1: Ulnar
2: Median
3: Medial pectoral nerve
4: Axillary
5: Musculocutaneous
6: Radial
7: Radial
8 : Accessory
9: Dorsal scapular
10: median and ulnar