Anatomy, Block 1: Forearm And Elbow Joint

Front 1

Collateral circulation around the elbow is important so that

Back 1

blood flow is maintained when elbow is flexed, blocking the brachial artery

permits ligations/anastomoses

Front 2

All the muscles of the flexor compartment of the forearm are innervated by the ___________ nerve except for which muscles?

Back 2

-median nerve
-ulnar nerve innervations: flexor carpi ulnaris and the flexor digitorum profUndus (half of it)

Front 3

The muscles of the extensor compartment of the arm and forearm are all innervated by what nerve?

Back 3

radial nerve

Front 4

Below the elbow, injury to the radial nerve (causes/will not cause) the characteristic ___________. Above the elbow, injury to the radial nerve (causes/will not cause) the characteristic ______________.

Back 4

above elbow-- causes wrist drop

below elbow--will not cause wrist drop

Front 5

Extensor carpi radialis longus and brevis cause...

Back 5

extension and aBduction of hand

Front 6

The radial nerve pierces the ____________ muscle and can become entrapped, causing _____________.

Back 6

supinator

wrist drop

Front 7

What are the deep muscles of the posterior compartment of the forearm?

Back 7

-supinator
-abductor pollicis longus
-extensor pollicis brevis
-extensor pollicis longus
-extensor indices

Front 8

Deep to the extensor retinaculum, you will find ____________________ for the long extensor tendons of the hand.

Back 8

six osseofibrous tunnels for

Front 9

What 2 muscles form the anterior boundary of the anatomical snuffbox?

Back 9

abductor pollicis longus and extensor pollicis brevis

Front 10

Tenderness to the "floor" of the anatomical snuffbox indicates what?

Back 10

scaphoid fracture

Front 11

A lesion in the ulnar nerve would cause

Back 11

adduction and flexion in the wrist; claw hand

Front 12

The anterior compartment of the forearm is innervated mostly by the ____________ nerve. What muscles are innervated by the ulnar nerve?

Back 12

-median

-ulnar: flexor carpi ulnaris, flexor digitorum profundus (ulnar half)

Front 13

The anterior-interosseus branch of the median nerve innervates what 3 muscles?

Back 13

-flexor digitorum profundus (the other half)
-flexor pollicis longus
-pronator quadratus

Front 14

A lesion of the medial nerve causes what kind of deformity?

Back 14

ape hand

Front 15

What kind of joint is the elbow joint?

Back 15

synovial, hinge

Front 16

The elbow joint is a compound joint. Laterally, you have the __________ joint and medially you have the ____________ joint.

Back 16

humeroradial joint - capitulum of humerus with head of radius

humeroulnar joint - trochlea of humerus with trochlear notch of ulna

Front 17

The carrying angle of the elbow (ranging from 5 to 15 degrees) is slightly larger in

Back 17

females. they have smaller shoulders and wider hips

Front 18

What is the medial ligament of the elbow?

Back 18

ulnar collateral ligament

Front 19

What is the lateral ligament of the elbow?

Back 19

radial collateral ligament

Front 20

The fibrous capsule of the elbow is weak in what directions?

Back 20

anterior and posterior (so you can flex at the elbow)

Front 21

The radial collateral ligament blends distally with what ligament?

Back 21

annular ligament of radius

Front 22

The subtendinous olecranon bursa is found

Back 22

between triceps tendon and olecranon of ulna

Front 23

Friction against the _____________________ causes olecranon bursitis (student's elbow)

Back 23

subcutaneous olecranon bursa

Front 24

The medical term for tennis elbow is

Back 24

lateral epicondylitis

Front 25

The medical term for golfer's elbow is

Back 25

medial epicondylitis

Front 26

The proximal radioulnar joint is found encapsulated in the..

Back 26

annular ligament of the radius

Front 27

The proximal radioulnar joint is what kind of joint?

Back 27

synovial, pivot

Front 28

In Nursemaid's elbow, the ___________ becomes subluxed (dislocated) from the ___________ ligament.

Back 28

radial head becomes subluxed from its annular ligament

Front 29

At the distal radioulnar joint, what kind of movement occurs?

Back 29

the ulnar notch of the radius rotates around the head of the ulna

Front 30

In the distal radioulnar joint, the ulna and radius are bound together by the..

Back 30

triangular ligament (a fibrocartilaginous articular disc)