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Post. Forearm&hand

Gross II - Zumpano Fall 2010

QuestionAnswer
Origin of ANCONEUS Lateral epicondyle of humerus
Insertion of ANCONEUS Lateral side of olecranon & shaft of ulna. Joint capsule of elbow
Innervation of ANCONEUS Radial n
Spinal levels of ANCONEUS C7,8, T1
Actions of ANCONEUS Weakly assists triceps & extends joint capsule of elbow during extension of elbow (to keep it from getting pinched)
Origin of BRACHIORADIALIS Upper 2/3rds of lateral supracondylar ridge of humerus
Insertion of BRACHIORADIALIS Lateral aspect of styloid process of ulna
Innervation of BRACHIORADIALIS Radial n.
Spinal level of BRACHIORADIALIS C6
Action of BRACHIORADIALIS Flexes a semiprone forearm
Origin of EXTENSOR CARPI RADIALIS LONGUS Lower 1/3rd of lateral supracondylar ridge of humerus
Insertion of EXTENSOR CARPI RADIALIS LONGUS Base of 2nd metacarpal
Innervation of EXTENSOR CARPI RADIALIS LONGUS radial n.
Spinal levels of EXTENSOR CARPI RADIALIS LONGUS C6,7
Action of EXTENSOR CARPI RADIALIS LONGUS extends wrist
When acting in unison with flexor carpi radialis m EXTENSOR CARPI RADIALIS LONGUS will ______ abduct hand
When acting synergistically with extensor carpi ulnaris EXTENSOR CARPI RADIALIS LONGUS does what? fixes the wrist
Origin of EXTENSOR CARPI RADIALIS BREVIS lateral epicondyle of humerus
insertion of EXTENSOR CARPI RADIALIS BREVIS base of 3rd metacarpal
innervation of EXTENSOR CARPI RADIALIS BREVIS deep branch of radial n
Spinal level of EXTENSOR CARPI RADIALIS BREVIS C7
Action of EXTENSOR CARPI RADIALIS BREVIS assists extensor carpi radialis longus
Origin of EXTENSOR DIGITORUM Lateral epicondyle of humerus via common extensor tendon
Insertion of EXTENSOR DIGITORUM dorsal digital expansion of medial 4 digits
Innervation of EXTENSOR DIGITORUM Posterior interosseous n.
Spinal level of EXTENSOR DIGITORUM C7
Action of EXTENSOR DIGITORUM Extend carpophalangeal and interphalangeal joints
Origin of EXTENSOR DIGIT MINIMI medial belly of extensor digitorum
Insertion of EXTENSOR DIGIT MINIMI Dorsal digital expansion of little finger via 1 or 2 tendons
Innervation of EXTENSOR DIGIT MINIMI Posterior interosseous n.
Spinal level of EXTENSOR DIGIT MINIMI C7
Action of EXTENSOR DIGIT MINIMI Assists extensor digitorum at little finger
Origin of EXTENSOR CARPI ULNARIS Lateral epicondyle of humerus
Insertion of EXTENSOR CARPI ULNARIS Medial side base of 5th metacarpal
Innervation of EXTENSOR CARPI ULNARIS Posterior interosseous n.
Spinal level of EXTENSOR CARPI ULNARIS C8
Action of EXTENSOR CARPI ULNARIS Acting w/ flexor carpi ulnaris - adducts hand; acting with extensor carpi radialis longus & brevis - fixes wrist; extends wrist
Origin of SUPINATOR lateral epicondyle of humerus; radial collateral ligament; supinator crest of ulna
Insertion of SUPINATOR Lateral surface of proximal 1/3rd of radius
Innervation of SUPINATOR Deep branch of radial n.
Spinal level of SUPINATOR C6
Origin of ABDUCTOR POLLICIS LONGUS Posterior surfaces of radius, ulna & interosseous membrane
Insertion of ABDUCTOR POLLICIS LONGUS base of 1st metacarpal & trapezium
Innervation of ABDUCTOR POLLICIS LONGUS posterior interosseous n.
Spinal level of ABDUCTOR POLLICIS LONGUS C8
Action of ABDUCTOR POLLICIS LONGUS abducts & extends thumb
Origin of EXTENSOR POLLICIS BREVIS Posterior surface of radius & interosseous membrane
Insertion of EXTENSOR POLLICIS BREVIS base of proximal phalanx of thumb
Innervation of EXTENSOR POLLICIS BREVIS Post. interosseous n.
Spinal level of EXTENSOR POLLICIS BREVIS C8
Action of EXTENSOR POLLICIS BREVIS extends metacarpophalangeal joint
Origin of EXTENSOR POLLICIS LONGUS Posterior shaft of ulna & interosseous membrane
Insertion of EXTENSOR POLLICIS LONGUS Base of distal phalanx of thumb
Innervation of EXTENSOR POLLICIS LONGUS Post. interosseous n.
Spinal level of EXTENSOR POLLICIS LONGUS C8
Action of EXTENSOR POLLICIS LONGUS Extends thumb at interphalangeal and metacarpophalangeal joints
Origin of EXTENSOR INDICIS Posterior surface of interosseous membrane; posterior surface of ulna
Insertion of EXTENSOR INDICIS Dorsal digital expansion of index finger
Innervation of EXTENSOR INDICIS Posterior interosseous n.
Spinal level of EXTENSOR INDICIS C8
Action of EXTENSOR INDICIS Extends index finger assisting extensor digitorum
What is the main nerve found in posterior forearm? Radial
median n. innervates skin on what part of dorsum of hand? tips of 1st 3 1/2 digits
Grooves in radius correlate to what muscles? medial to styloid process = extensor carpi radialis longus & brevis; middle = extensor pollicis longus; most medial = extensor digitorum & indicis
What muscle is found btw groove created by distal radioulnar joint? Extensor digiti minimi
Muscle that lays in groove of ulna? Extensor carpi ulnaris
List the muscles in the superficial layer of posterior forearm that are innervated by Radial n? Anconeus, Brachioradialis, Extensor carpi radialis longus
List the muscles in the superficial layer of posterior forearm that are innervated by Posterior interosseous N? Extensor digitorum, extensor digiti minimi, extensor carpi ulnaris
What muscles in the posterior forearm are innervated by deep branch of radial n? Extensor carpi radialis brevis (superficial) & Supinator (deep)
What are the deep muscles of posterior forearm that are innervated by Posterior Interosseous n? Abductor pollicis longus, Extensor pollicis longus & brevis, Extensor indicis
What is the medial boundary of anatomical snuff box? Extensor pollicis longus
What is the lateral boundary of anatomical snuff box? Extensor pollicis brevis & abductor pollicis longus
What makes up the floor of the anatomical snuff box? scaphoid
Deep branch of radial nerve runs through what muscle in forearm? supinator
Deep branch of radial nerve changes it's name to ____ when it exits supinator? Posterior interosseous n.
Superficial branch of radial nerve innervates what digits? Proximal 1/3rd & lateral 3 1/2 digits
Ulnar n innervates what digits? Medial 1 1/2 digits
Created by: mrw2013
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