WK3(lab): elbow & forearm complex (bony landmarks + muscles)

bony landmarks on skeleton + syndaver muscles w/ O, I, A, IN

scapula: supraglenoid tubercle

scapula: infraglenoid tubercle

deltoid: trochlea

ulna: trochlear notch

ulna: olecranon

distal humerus: olecranon fossa

ulna: coronoid fossa

ulna: coronoid process

radial notch of the ulna

ulnar notch of the radius

radius: fovea

distal humerus: capitulum

radius: radial (bicipital) tuberosity

ulna: supinator crest

Syndaver: biceps brachii

biceps brachii — O, I, A, IN

origin:

• long head: supraglenoid tubercle of scapula

• short head: corocoid process of scapula

insertion:

• radial tuberosity

• bicipital aponeurosis

action:

• elbow flexion

• shoulder flexion

• supination (synergist)

innervation:

• musculocutaneous nerve

Syndaver: brachialis

brachialis — O, I, A, IN

origin:

• distal half of the anterior surface of the humerus

insertion:

• coronoid process of the ulna

• ulnar tuberosity

action:

• elbow flexion

innervation:

• musculocutaneous nerve

• small branch from radial nerve

Syndaver: brachioradialis

brachioradialis — O, I, A, IN

origin:

• proximal 2/3 of lateral supracondylar ridge of the humerus

insertion:

• radial styloid process

action:

• elbow flexion of the neutral wrist (hammer curl!)

innervation:

• radial nerve

Syndaver: triceps long head

triceps long head — O, I, A, IN

origin:

• infraglenoid tubercle of scapula

insertion:

• olecranon process of ulna

action:

• shoulder extension

• elbow extension

• slight shoulder ABDuction

innervation:

• radial nerve

Syndaver: triceps lateral head

triceps lateral head — O, I, A, IN

origin:

• posterior surface of proximal half of the humerus

insertion:

• olecranon process

action:

• shoulder extension

• elbow extension

innervation:

• radial nerve

Syndaver: triceps medial head

triceps medial head — O, I, A, IN

origin:

• posterior surface of the distal half of the humerus

insertion:

• olecranon process

action:

• shoulder extension

• elbow extension

innervation:

• radial nerve

Syndaver: supinator

supinator — O, I, A, IN

origin:

• lateral epicondyle of the humerus

• supinator crest of the ulna

• annular ligament

• radial (lateral) collateral ligament

insertion:

• anterior lateral surface of proximal 1/3 of radial shaft

action:

• supination

innervation:

• radial nerve

Syndaver: pronator teres

pronator teres — O, I, A, IN

origin:

• medial epicondyle of the humerus

• common flexor tendon (CFT)

• coronoid process of the ulna

insertion:

• middle of the lateral surface of the radius

action:

• pronation

• elbow flexion (synergist)

innervation:

• median nerve

Syndaver: pronator quadratus

pronator quadratus — O, I, A, IN

origin:

• medial anterior surface of distal ulna

insertion:

• lateral anterior surface of distal radius

action:

• pronation

innervation:

• median nerve

scapula: coracoid process

distal humerus: radial fossa

distal humerus: medial epicondyle

distal humerus: lateral epicondyle

distal humerus: medial supracondylar ridges

distal humerus: lateral supracondylar ridges

ulna: styloid process

radius: styloid process