Quiz 5 Flashcards
What is the action of the brachioradialis?
Flexed elbow & assist to pronate and supinate
The brachialis muscle is ___to the biceps brachii muscle.
Deep
What is unique about the palmaris longus muscle?
Is absent in about 11% of the population, there may be 2, long and proximal tendon
The tendon of _____ divides and inserts onto the middle phalanges of the digits
Flexor digitorum Superficials
What muscle inserts into the styloid process of the radius?
Brachioradialis
What structure clearly divides the wrist flexors from the extensors?
Brachioradialis and shaft of ulna
Tendons that make-up the anatomical snuffbox?
Extensor pollicis longus, extensor pollicis brevis , abductor pollicis
What is the origin of the abductor pollicis longus?
Posterior surfaces of ulna, radius, and interosseous
Insertion of the flexor pollicis longus?
Base of distal phalanx of thumb
What are the four Long muscles of the thumb?
Abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis flexor pollicis longus
What is the origin of the supinator?
Lateral epicondyle of humerus
What muscle assist the pronator teres with pronation of the forearm?
Pronator quadratus
Triangular shaped muscle, that is a weak elbow is extensor and lateral to the olecranon process?
Anconeus
What muscles are used when you bring your thumb and pinky finger together?
Opponents digiti minimi & opponens pollicis
What is the action of the lubricals?
Extend 2nd-5th fingers at interphalangeal joints & Flex 2nd-5th fingers at the metacarpophalangeal joints
The head of the radius is surrounded by what ligament?
Annular ligament
What keeps the flexor tendons in place at the wrist?
Flexor retinaculum
The hypothemar eminence is on what side of the palm?
Ulnar side of the palm
What pulse can be felt at the thumb side of the wrist?
Radial artery
Where can you palpate the ulnar nerve?
Medial side of the flexor surface
Function of the radial and ulnar collateral ligaments?
Stabilize head of radius & ulna
What muscles assist the pronator teres with pronation?
Pronator Quadratus
Finger and wrist extension would lengthen what muscle?
What are the superficial muscles of the forearm?
Flexor carpi radialis, pronator teres, palamaris longus, flexor carpi ulnaris
Bringing the thumb and pinky together uses mainly these two muscles?
Opponens pollicis & Opponens digiti minimi
What structure pads the space between the olecranon process and the skin of the elbow?
Olecranon bursa
In the wrist the ulnar nerve and artery pass through a channel called the tunnel of guyon, formed by which two carpal bones?
Pisiform & hook of hamate
Which are more powerful, pronators or supinators?
Supinator
