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25 Cards in this Set

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What are the axillary artery divisions?
Axillary to brachial (at lower margin of teres major) (gives of profunda brachii) to radial and ulnar
What is the Allen test?
A test for occlusion of the radial or ulnar artery, in which one of these arteries is compressed after blood has been forced out of the hand by clenching it into a fist; failure of the blood to diffuse into the hand when opened indicates that the artery not compressed is occluded.
What is the median nerve sensory innervation?
palmar aspect:
thumb, index, long and lateral half of ring fingers
dorsal aspect:
tips of same fingers and thumb
What is the unlar nerve sensory innervation?
palmar and dorsal aspects
medial half of ring and little fingers
What is the radial nerve sensory innervation?
Dorsum of arm, forearm and (except tips) of
thumb, index, long and lateral half of ring fingers
Volkmann’s Ischemic Syndrome
Results from sudden complete occlusion of Brachial artery
After 6 hours irreversible ischemia leads to muscle necrosis & permanent flexion deformity
What are the three groups of the forearm flexors?
Superficial group(4)
Intermediate (1)
Deep group (3)
Muscles of superficial flexor:
Four muscles:
Pronator teres
FCR
Palmaris longus
FCU
Intermediate muscles of flexor forearm:
Flexor Digitorum Superficialis
Spans from medial epicondyle and ulna, to radius before dividing into 4 slips to the 4 fingers
Deep group of flexors:
Flexor Digitorum Profundus (sublimis)
Flexor Pollicis Longus
Pronator Quadratus
Flexor digitorum Profundus innervation:
From upper 1/2 of ulna
To Distal phalanx of four fingers
4th & 5th digit = ulnar nerve
2nd & 3rd digit = median nerve
Innervation of flexors:
All but 1 1/2 muscles receive innervation via the median nerve. Exceptions are innervated by Ulnar Nerve:
Flexor Carpi Ulnaris
1/2 of Flexor Digitorum Profundus
What are the forearm extensor groups?
Can be divided into four groups of three muscles each, all innervated by Radial N
Outcropping group
Medial group
Lateral group
Miscellaneous group
Extensor outcropping group, also known as anatomical snuff box:
Group of muscles to the thumb which arise from the center of the forearm
EPL
EPB
Abductor PL
Anatomical snuff box:
Formed by the tendons of the outcropping group as they pass the wrist
EPB & AbPL = lateral edge
EPL = medial edge
Location of scaphoid
Medial group of forearm extensors:
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris
Lateral group of forearm extensors:
Brachioradialis
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Miscellaneous group fo forearm extensors:
Extensor Indicis
Supinator
Anconeous
Function of anconeous:
Acts to pull synovial membrane out of joint space during extension
Innervation of forearm extensors:
All 12 muscles are innervated by the radial nerve
Radial nerve splits prior to the supinator and the deep branch passes through the supinator to reach deeper muscles
Potential nerve entrapment areas:
Each nerve passes through a muscle on its course through the forearm
Radial - Supinator
Median - Pronator Teres
Ulnar - Flexor Carpi Ulnaris
Subluxation & Dislocation Radial Head is called:
Nursemaid's elbow
Bones of hand acronym:
S.L.T.P.T.T.C.H.
scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
What are the contents of the carpal tunnel? 10 things
4 flexor digitorum superficialis tendons, 4 flexor digitorum profundus tendons, median nerve, flexor pollicus longus
contents of Guyon canal:
Contains ulnar artery and ulnar nerve
also called ulnar canal