Biomechanics And Kinesiology - Elbow, Forearm And Hand

Question 1

Sublaxation

Answer 1

• dislocation

Question 2

Interosseous membrane

Answer 2

• binds radius to ulna

- provides mechanisms for transmitting force proximally through upper limb

Question 3

Biceps brachii long head

Answer 3

O - supraglenoid tubercle of the scapula

I - bicipital tuberosity of the radius

A - flexion of the elbow joint and supination of the forearm

Question 4

Biceps brachii short head

Answer 4

O - apex of the coracoid process of the scapula

I - bicipital tuberosity of the radius

A - flexion of the elbow joint and supination of the forearm

Question 5

Brachialis

Answer 5

O - distal aspect of the anterior surface of the humerus

I - coracoid process and tuberosity on the proximal ulna

A - flexion of the elbow

Question 6

Brachioradialis

Answer 6

O - lateral supracondylar ridge of the humerus

I - near styloid process at the distal radius

A - flexion of the elbow and rotation of the forearm

Question 7

Triceps brachii long head

Answer 7

O - infraglenoid tubercle of the scapula

I - olecranon process of the ulna

A - extends and adducts the shoulder

Question 8

Triceps brachii lateral head

Answer 8

O - posterior humerus, superior and lateral to the radial groove

I - olecranon process of the ulna

A - extension of the arm

Question 9

Triceps brachii medial head

Answer 9

O - posterior humerus, inferior and medial to the radial groove

I - olecranon process of the ulna

A - extension of the arm

Question 10

Flexor carpi radialis

Answer 10

O - medial epicondyle of the humerus

I - bases of the second and third metacarpals

A - flexes and abducts the hand at the wrist

Question 11

Palmaris longus

Answer 11

O - medial epicondyle of the humerus

I - flexor retinaculum and palmar aponeurosis

A - flexes the hand at the wrist

Question 12

Flexor carpi ulnaris

Answer 12

O - medial epicondyle of the humerus

I - pisiform, hook of the hamate and base of fifth metacarpal

A - flexes and adducts the hand at the wrist

Question 13

Flexor digitorum superficialis humeroulna head

Answer 13

O - medial epicondyle of the humerus

I - middle phalanges of digits 2 to 5

A - flexes the middle phalanges

Question 14

Extensor digitorum

Answer 14

O - lateral epicondyle of the humerus

I - dorsal base of the proximal phalanx of the fingers

A - extends the wrist and the fingers

Question 15

Extensor carpi ulnaris

Answer 15

O - lateral epicondyle of the humerus

I - posterior ulna surface of the base of fifth metacarpal

A - extends and adducts the hand at the wrist

Question 16

Extensor carpi radials longus

Answer 16

O - lateral epicondyle of the humerus and lateral supracondylar ridge of the humerus

I - radial posterior surface of the base of the second metacarpal

A - extends and abducts the hand at the wrist

Question 17

Extensor carpi radialis brevis

Answer 17

O - lateral epicondyle of the humerus

I - radial posterior surface of the base of the third metacarpal

A - extends and abducts the hand at the wrist