Upper Extremity Flashcards
Contents of axilla (medial to distal)
Axillary vein, Axillary artery, brachial plexus
Boundaries of the axilla
Ant: pectoral Post: scapular Medial: costal Lateral: humeral Apex: clavicle, scapula, first rib Base: skin, Axillary fascia
Rotator cuff muscles
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
Nerve supply of teres minor
Axillary
Rotator cuff:most commonly affected
Supraspinatus
Quadrangular triangle
Above: teres minor
Below: teres major
Medial: long head of triceps brachii
Lateral: surgical neck of humerus
Contents of quadrangular space
Axillary nerve
Posterior Circumflex humeral vessel
Triangular space
Above: teres minor
Below: teres major
Lateral: long head of triceps brachii
Content of triangular space
Circumflex scapular vessels
Nerve supply of anterior flexor group
Musculocutaneous n.
Main flexor of the forearm
Brachialis
Flexor muscle of the forearm, inner acted by median nerve except
FCU, FDP: ulnar nerve
Muscles originating from the medial epicondyle of the humerus
Pronator teres FCR Palmaris longus FCU- humeral head FDS- humoroulnar head
Flexor muscle found posteriorly
Brachioradialis
Originates at lateral epicondyle of humerus
ECRB ED EDM ECU Anconeus Supinator
Inflammation of common flexor
Golfer’s elbow
Inflammation of common extensors
Tennis elbow
ABG: brachial artery
Medial to the biceps tendon in the cubital fossa
Contents of the cubital fossa (medial to lateral)
Median nerve
Brachial artery
Biceps brachii tendon
Radial nerve
Innervation of the near muscles
Median nerve
*adductor pollicis: ulnar nerve
Thenar muscles
Abductor pollicis
Flexor pollicis
Opponents pollicis
Adductor pollicis
Hypothenar muscles
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Innervation of hypothenar muscle
Ulnar nerve
Rule in upper extremity
Anterior: flexor
Posterior:extensor
Rule in lower extremity
Anterior: extensor
Posterior: flexor
Innervation of the intrinsic muscles of the hand
Ulnar nerve
Brachial plexus
"Robert Taylor Drinks Coffee Black" Roots: 5 (C5-T1) Trunk: 3 (upper, middle, lower) Division: 6 Cord: 3 (lateral, posterior, medial) Branch: musculocutaneous (LC), median (LC, MC), ulnar (MC), axillary and radial (PC)
Posterior division is formed from _____division of all three trunks
Posterior
Roots arising from ____
Neck
Division at level of ____
Clavicle
Cords at ____
Axilla
Anterior division fibers
Musculocutaneous, median, ulnar
Lateral and medial pectoral nerves
Posterior division
Radial, Axillary
Upper, middle, lower subscapular n.
Innervation of SERRATUS ANTERIOR
Long thoracic (C5-C7)
Muscles innervated by musculocutaneous (C5-C7)
Coracobrachialis
Biceps brachii
Brachialis
Roots of ulnar nerve
C8-T1
medial root of Median nerve
C8 and T1
Innervated by Axillary nerve/ root
Deltoid, teres minor / C5 and C6
Roots of Radial nerve
C5, C6, C7, C8, T1
Innervated by radial n.
Posterior/extensor compartment of the arm and forearm
Innervated by the median n.
Anterior/flexor compartment of the forearm, except FCU and FDP
Tendon reflex: biceps brachii
C5, C6
Tendon reflex: triceps tendon
C6, C7, C8
Tendon reflex: brachioradialis tendon
C5, C6, C7
Waiter’s tip
Erb-Duchenne’s syndrome
C5,C6
Ape hand and claw hand
Altered sensation in medial hand, ring, and little finger
Klumpke’s paralysis
C8, T1
Long thoracic n. Lesion
Winging of the scapula
Weakness on protraction
SERRATUS anterior (C5, C6, C7)
Radial n. Injury
Wrist drop
Ulnar nerve injury
Claw hand deformity
Median n. Injury
Ape hand
Hand of Benediction
Nerve affected during fracture of the surgical neck of humerus
Axillary nerve
Nerve affected during spinal fracture at mid shaft
Radial nerve
First part of Axillary artery
Superior thoracic artery: first 2 ICS
2nd part of Axillary artery
Thoracoacromial (pectoral, acromial, deltoid, clavicular)
Lateral thoracic
3rd part of Axillary artery
Subscapular (thoracodorsal-SERRATUS anterior, circumflex scapular- subscapularis, teres major and latissimus dorsi)
Cephalic vs. basilic
Lateral vs. medial
First bone to begin ossification and the last to complete at age 21
Clavicle
Weakest part of the clavicle
Jxn bet the medial and lateral aspect
*medial 2/3 convex, lateral 1/3 flattened
Fracture of the clavicle results to _____
Brachial plexus injury and hemorrhage from subclavian vein
Supracondylar fracture of the humerus (nerve injury)
Median nerve injury
Medial epicondyle fracture
Ulnar n.
Silver fork
Displacement of the distal segment
Colle’s fracture
Anterior displacement
Smith’s fracture
Boundaries of anatomical snuff box
Lat: tendons of EPB and Abd PL
Med: tendon of EPL
Floor: scaphoid and trapezius
Contents of snuff box
Radial artery, styloid process of radius, base of first metacarpal bone
C2
Back of head
Tip of shoulder
C5
C6
Thumb
Middle finger
C7
Small finger
C8
Nipple
T4-T5
Inguinal
L1
Knee, medial leg
L4
L5
Lateral leg, improve
S1
small toe
S5
Perenium
Used vein for BLOOD extraction
Median cubital v