FABS Quiz 3

3 Landmarks of the elbow that can be palpated.

Medial epicondyle, lateral epicondyle, olecranon

Surface anatomy of arm includes what?

The elbow, cubital fossa, head of the ulna, ulnar styloid process, radial styloid process

What is the site of median nerve?

Palmaris longus tendon

Where can you feel the radial artery pulse

Flexor carpi radialis tendon

What is the cubital fossa?

triangular hollow area on anterior aspect of the elbow

Boundaries of cubital fossa?

Superior: imaginary line between medial and lateral epicondyles

Medially: pronator teres

Laterally: brachioradialis

Floor of cubital fossa?

Brachialis and supinator muscle

Roof of cubital fossa?

deep fascia - reinforced by bicipital aponeuroses, subcutaneous tissue, and skin

Contents of cubital fossa.

Terminal brachial a. and branches

deep accompanying veins

biceps brachii tendon

median n

What overlies the fossa?

median cubital vein

medial and lateral antebrachial cutaneous n.

Extensor and supinator muscles are in which compartment? Innervated by what nerve?

Posterior compartment; radial n.

Flexor and pronator muscles are in which compartment? Innervated by what nerve?

Anterior compartment; median n.

Two exceptions for flexors being innervated by median n are what? Innervated by what instead?

Flexor carpi ulnaris (FCU) and medial head flexor digitorum profundus (FDP)

ulnar nerve

Deep layer of anterior compartment is innervated by what branch of median n.?

ant. interroseous n.

What is a composite muscle of anterior compartment?

Medial head of FDP

Pronator Teres O and I

O: Humeral head of medial epicondyle

I: lateral surface of midshaft of radius

Pronator Teres A and N

A: Pronate forearm and flex elbow joint

N: median (C6,7)

Does pronator teres initiate the pronation or give strength?

give strength

Flexor carpi radialis O and I:

O: medial epicondyle

I: base of 2nd and 3rd metacarpal bone

Flexor carpi radialis A and N

A: flex and abduct hand at wrist

N: median n

Palmaris Longus O and I

O: medial epicondyle

I: distal half of flexor retic. and palmar aponeurosis

Palmaris Longus A and N

A: flex hand at wrist and tighten palmar aponeurosis

N: median n (C7,8)

Flexor carpi ulnaris O and I

O: medial epicondyle

I: Pisiform, hook of hamate, bae of 5th metacarpal

Flexor carpi ulnaris A and N

A: flexes and adducts hand at wrist

N: ulnar n (C7,8)

What are the muscles of the superficial layer?

Flexor carpi ulnaris

Palmaris longus

flexor carpi radialis

Pronator teres

Flexor digitorum superficialis O and I

O: Medial epicondyle, ulnar collateral lig., coronoid process of ulna, superior anterior border of radius

i: middle phalanges of medial 4 digits

Flexor digitorum superficialis A and N

A: flex middle phalanges at PIP, proximal phalanges at MCP, flex wrist

N: median N (C7-T1)

Flexor Pollicis longus O and I

O: anterior surface of radius and adjacent interroseous membrane

I: base of distal phalanx of thumb

Flexor Pollicis longus A and N

A: flexes phalanges of first digit

N: anterior interroseous n. of median (C8,T1)

Pronator quadratus O and I

O: distal ¼ of anterior surface of ulna

I: distal ¼ of anterior surface of radius

Pronator quadratus A and N

A: initiates pronation of forearm

N: anterior interosseous n. of median n (C8, T1)

What are the deep muscles of anterior compartment?

flexor digitorum profundus

flexor pollicis longes

pronator quadratus

Brachioradialis O and I

O: lateral supracondylar of humerus

I: lateral surface of distal end of radius

Brachioradialis A and N

A: flexes forearm when forearm is midpronated

N: radial n (C5,6,7)

Extensor carpi radialis longus O and I

O: lateral supracondylar

I: base of 2nd metacarpal

Extensor carpi radialis longus A and N

A: extend and abduct hand

N: radial n(C6, 7)

Extensor carpi radialis brevis O and I

O: lateral epicondyle

I: base of 2nd and 3rd metacarpal

Extensor carpi radialis brevis A and N

A: extend and abduct hand

N: deep branch of radial

Extensor digitorum O and I

O: lateral epicondyle

I: extensor expansions of medial 4 digits

Extensor digitorum A and N

A: Extend medial 4 digits at MCP, extend hand

N: deep branch of radial

Extensor digiti minimi O and I

O: lateral epicondyle

I: extensor expansion of 5th finger

Extensor digiti minimi A and N

A: extend 5th digit at MCP and IP joint

N: deep branch of radial n.

Extensor carpi ulnaris O and I

O: lateral epicondyle

I: Base of 5th metacarpal bone

Extensor carpi ulnaris A and N

A: extends and adducts hand

N: deep branch of radial

Anconeus O and I

O: lateral epicondyle

I: olecranon and proximal posterior surface of ulna

Anconeus A and N

A: abduction of ulna in pronation

N: radial n

Supinator O and I

O: lateral epicondyle, radial collateral, anular ligament, supinator crest, supinator fossa of ulna

I: lateral, psoterior and anterior surface of proximal 1/3 of radius

Supinator A and N

A: supinate forearm

N: deep branch of radial n

Abductor pollicis longus O and I

O: posterior surface of ulna, radius and interosseous membrane

I: base of 1st metacarpal

Abductor pollicis longus A and N

A: abducts and extends thumb

N: posterior interrosseous n

Extensor pollicis brevis O and I

O: posterior surface of radius and interosseous membrane

I: base of proximal phalanx of thumb

Extensor pollicis brevis A and N

A: extend proximal phalanx of thumb

N: posterior interosseous n

Extensor pollicis longus O and I:

O: Posterior surface of middle 1/3 of ulna

I: base of distal phalanx of thumb

Extensor pollicis longus A and N

A: extends distal phalanx of thumb

N: posterior interosseous n

Extensor indicis O and I

O: posterior surface of ulna and interosseous membrane

I: extensor expansion of 2nd digit

Extensor indicis A and N

A: extends 2nd digit and helps extend hand

N: posterior interosseous n

Direct branches of the ulnar arteries AT THE ELBOW?

anterior and posterior ulnar recurrent

common interroseous

Indirect branches of the common interosseous artery AT THE ELBOW?

anterior and posterior interosseous

Recurrent interosseous is a branch of what artery at elbow?

Posterior interosseous

What are the ulnar arteries at the wrist?

muscular branches

palmar carpal br

dorsal carpal br

superficial and deep br

What arteries contribute to the palmar arch?

superficial ulnar and superficial radial

How much of the Superficial artery is provided by ulnar?

70%

How much of the deep artery is provided by radial?

70%

How much of the dorsal artery is provided by radial?

50%

What are the Radial artery at the ELBOW?

muscular branches

radial recurrent

What are the Radial artery at the WRIST?

palmar carpal

dorsal carpal

superficial and deep palmar brances

What are the superficial veins of the forearm?

Cephalic, basilic, median cubital and antebrachial

Deep veins of the forearm include?

accompanying veins of arteries

• arise from deep venous arcade

Median nerve pierces what muscle? Nerve of what compartment?

pronator teres; anterior compartment

Median nerve enters forearm with what artery? Passes by b/t what when leaving cubital fossa?

brachial artery; pronator teres heads

Branches of median n.?

anterior interosseous

palmar cutaneous

Ulnar nerve pierces what and enters forearm by passing between what?

flexor carpi ulnaris

Branches of ulnar nerve?

articular branches

muscular branches

palmar cutaneous

Radial nerve pierces what muscle? Appears between what muscles?

supinator m.; bracialis and bracioradialis

Branches of radial nerve.

superficial branch, deep branch, posterior interosseous, posterior cutaneous nerve of forearm

Musculocutaneous pierces what muscle?

corachobracialis