10. UE - Myology

Question 1

What are the thoracoappendicular muscles? (4)

Answer 1

Pectoralis Major
Pectoralis Minor
Subclavius
Serratus Anterior

Question 2

What are the posterior axioappendicular muscles? (5)

Answer 2

Trapezius
Latissimus Dorsi
Rhomboid Major
Rhomboid Minor
Levator Scapulae

Question 3

What are the scapulohumeral muscles? (6)

Answer 3

Deltoid
Subscapularis
Supraspinatus
Infraspinatus
Teres Minor
Teres Major

Question 4

What are the brachial muscles of the anterior compartment? (3)

Answer 4

Biceps Brachii
Coracobrachilais
Brachialis

(Musculocutaneous N.)

Question 5

What are the brachial muscles of the posterior compartment? (2)

Answer 5

Triceps Brachii
Aconeus

(Radial N.)

Question 6

Of the antebrachial flexor muscles, which are found in the superficial layer? (4)

Answer 6

Pronator Teres (Median N.)
Flexor Carpi Radialis (Median N.)
Palmaris Longus (Median N.)
Flexor Carpi Ulnaris (Ulnar N.)

Question 7

Of the antebrachial flexor muscles, which is found in the intermediate layer? (1)

Answer 7

Flexor Digitorum Superficialis (Median N.)

Question 8

Of the antebrachial flexor muscles, which are found in the deep layer? (3)

Answer 8

Flexor Digitorum Profundus
Flexor Pollicis Longus
Posterior Quadratus

Question 9

Of the antebrachial extensor muscles, which are found in the superficial layer? (6)

Answer 9

Brachioradialis 
Extensor Carpi Radialis Longus 
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris

Question 10

Of the antebrachial extensor muscles, which are found in the deep layer? (2)

Answer 10

Supinator

Extensor Indicis

Question 11

Of the antebrachial extensor muscles, which are outcropping muscles of the deep layer? (3)

Answer 11

Abductor Pollicis Longus
Extensor Pollicis Longus
Extensor Pollicis Brevis

Question 12

Of the hand muscles, which are found in the thenar eminence? (4)

Answer 12

Abductor Pollicis Brevis
Opponens Pollicis
Flexor Pollicis Brevis
Adductor Pollicis

Question 13

Of the hand muscles, which are found in the hypothenar eminence? (3)

Answer 13

Abductor Digiti Minimi
Flexor Digiti Minimi Brevis
Opponens Digiti Minimi

Question 14

What are the intermediate muscles of the hand? (4)

Answer 14

1st and 2nd Lumbrical
3rd and 4th Lumbrical
Dorsal Interossei (DABs) (Abduct)
Palmar Interossei (PADs) (AdDuct)

Question 15

Paralysis of the serratus anterior, resulting in “winging” of the scapula away from the thoracic wall, which makes abducting the upper limb beyond the horizontal position difficult, results from injury to what nerve?

Answer 15

Long Thoracic N.

Question 16

The supraspinatus, infraspinatus, teres minor, and subscapularis muscles are collectively referred to as the rotator cuff muscles and offer stability to the glenohumeral joint. Trauma can injure or tear any of the rotator cuff muscles resulting in instability of the glenohumeral joint. Which of the following is the most commonly injured?

A. Supraspinatus
B. Infraspinatus
C. Teres Minor
D. Subscapularis

Answer 16

A. Supraspinatus

Question 17

Striking the thumb placed over the bicipital tendon with a reflex hammer should produce a bicipital myotactic reflex, failure of the tendon to tighten up and the forearm to flex slight could suggest injury to which of the following?

A. Long Thoracic N.
B. Radial N.
C. Musculocutaneous N.
D. Axillary N.

Answer 17

C. Musculocutaneous N.

Question 18

Repetitive movement of the Long Head of the Biceps T. through the Intertubercular Groove makes that tendon susceptible to inflammation. Furthermore that tendon is capable of dislocating out of the Intertubercular Groove or even separating entirely from the Supraglenoid Tubercle, which results in the muscle balling up in the mid arm. This condition is known as…

A. Biceps Tendinitis
B. Crepitus
C. Popeye Deformity
D. All of the above

Answer 18

D. All of the above

Repetitive movement of the Long Head of the Biceps T. through the Intertubercular Groove makes that tendon susceptible to inflammation, known as Biceps Tendinitis, and even Crepitus, a crackling sound. Furthermore that tendon is capable of dislocating out of the Intertubercular Groove or even separating entirely from the Supraglenoid Tubercle, which results in the muscle balling up in the mid arm, a condition known as “Popeye Deformity.”

Question 19

What are the borders and contents of the triangular space on the posterior shoulder?

Answer 19

Borders:

• Teres Minor M.
• Teres Major M.
• Long Head of the Triceps Brachii M.

Contents:
- Circumflex Scapular A. and V.

Question 20

What are the borders and contents of the quadrangular space on the posterior shoulder?

Answer 20

Borders:

• Teres Minor M.
• Teres Major M.
• Long and Lateral Heads of the Triceps Brachii M.

Contents:

• Posterior Humeral Circumflex A. and V.
• Axillary N.

Question 21

What are the borders and contents of the triangular interval on the posterior shoulder?

Answer 21

Borders:

• Teres Major M.
• Long and Lateral Heads of the Triceps Brachii M.

Contents:

• Deep Brachial A. and V.
• Radial N.

Question 22

Repetitive use of the Superficial Extensor muscles of the Forearm can result in ______, or _______, and involves pain over the Lateral Epicondyle and down the posterior Forearm. Repeated flexion and extension of the Wrist strains the Periostium of the Lateral Humeral Epicondyle, called ________.

Answer 22

Elbow Tendinitis

“Tennis Elbow”

Lateral Epicondylitis

Question 23

What are the borders and contents of the “anatomical snuff box”?

Answer 23

Lateral (anterior) border:

• Abductor Pollicis Longus M.
• Extensor Pollicis Brevis M.

Medial (posterior) border:
- Extensor Pollicis Longus M.

Contents:

• Radial A. (deep to tendons)
• Superficial Radial N. (superficial to tendons)

Question 24

The complicated action of opposition of the thumb can be lost with injury to the _______. Even a very superficial injury of the palm can damage the recurrent branch of the ______ which innervates the muscles involved in opposition

Answer 24

Median N.