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Primate Anatomy Muscles 2
ventral forearm, dorsal forearm, hand
28
Anatomy
Undergraduate 3
03/20/2014

Additional Anatomy Flashcards

 


 

Cards

Term



Pronator Teres

Definition

 

 

 

origin - medial epicondyle of humerus

insertion - middle third of the lateral and volar surfaces of the radius

action - strong pronator of forearm, possibly also flexor of forearm at elbow

Term



Flexor Carpi Radialis

Definition

 

 

 

 

origin - medial epicondyle of humerus

insertion - base of 2nd metacarpal

action - flexes wrist

Term



Palmaris Longus

Definition

 

 

 

 

origin - medial epicondyle of humerus

insertion - palmar aponeurosis

action - tenses palmar aponeurosis, flexes wrist

Term



Flexor Carpi Ulnaris


Definition

 

 

 

 

origin - medial epicondyle of humerus

insertion - pisiform bone

action - flexes the wrist

 

Term



Flexor Digitorum Sublimis

Definition

 

 

origin - main head from medial epicondyle of humerus

second head from main head

insertion - main portion inserts on middle phalanges of digits 2,3,4,5

action - flexes middle phalanges, then the proximal, then the wrist

Term



Flexor Digitorum Profundus

Definition

 

 

origin - radial portion from radius and interosseous membrane

ulnar portion mostly from ulna

insertion - radial portion inserts on digits 1,2, and half of 3

ulnar portion on digits 3,4,5, terminal phalanges of digits

action - flexes terminal phalanges and down line to wrist

Term



Pronator Quadratus

Definition

 

 

 

 

origin - distal shaft of ulna (volar surface)

insertion - distal shaft of radius (volar surface)

action - assists in strong pronation of forearm

Term



Brachioradialis

Definition

 

 

 

 

origin - supracondylar or brachioradialis crest

insertion - distal radius

action - strong flexion of forearm at elbow

 

Term


Extensor Carpi Radialis Longus

Definition

 

 

 

origin - from supracondylar crest and perhaps lateral epicondyle

insertion - dorsal face of 2nd metacarpal

action - extends wrist

 

Term

 


Extensor Carpi Radialis Brevis

Definition

 

 

 

origin - lateral epicondyle of humerus

insertion - base of 3rd metacarpal

action - extends wrist

Term


Extensor Digitorum Communis

Definition

 

 

 

origin - lateral epicondyle of humerus

insertion - digits 2,3,4,5, generally to bases of middle phalanges

action - extends relevent digits

Term


Extensor Digiti 2 and 3 Proprius

Definition

 

 

 

origin - ulna

insertion - basal phalanges of digits 2,3

action - extends relevent digits

Term


Extensor Digiti 4 and 5 Proprius

Definition

 

 

 

origin - lateral epicondyle of humerus

insertion - ulnar side of 4th and 5th digits, on basal or second phalanx

action- extends relevent digits

Term



Extensor Carpi Ulnaris

Definition

 

 

 

 

origin - lateral epicondyle of humerus

insertion - dorsal aspect of base of 5th metacarpal

action - extends wrist

 

Term



Abductor Pollicis Longus

Definition

 

 

 

origin - ulna, radius, and interosseous membrane

insertion - base of 1st metacarpal, adjacent sesamoid bone

action - abducts thumb

Term



Extensor Pollicis Longus

Definition

 

 

 

 

origin - proximal ulna

insertion - terminal phalanx of thumb

action - extends thumb

Term



Supinator

Definition

 

 

 

origin - lateral epicondyle of humerus, also lateral border of ulna, proximal end

insertion - proximal half of radial shaft

action - supinates forearm at elbow

Term



Palmaris Brevis

Definition

 

 

 

 

origin - ulnar border of palmar aponeurosis

insertion - skin and pisiform

action - draws hypothenar skin toward palm

Term



Abductor Pollicis Brevis

Definition

 

 

 

origin - volar transverse carpal ligament and some hand bones

insertion - radial base of first pollical phalanx

action - abducts thumb

Term



Opponens Pollicis

Definition

 

 

 

origin - volar transverse carpal ligament and some hand bones

insertion - radial border of 1st metacarpal

action - rotates the thumb

Term



Flexor Pollicis Brevis

Definition

 

 

origin - two heads: one from volar transverse carpal ligament

one from some hand bones (trapezoid)

insertion - mostly with abductor pollicis brevis on radial base of 1st pollical phalanx

action - flexes thumb

Term



Adductor Pollicis

Definition

 

 

 

origin - bases of 2nd and 3rd metacarpals and central tendon of contrahentes muscles

insertion - ulnar side of base of 1st pollical phalanx, and usually extendin to 2nd phalanx

action - main adductor of thumb

Term



Abductor Digiti Quanti Manus

Definition

 

 

origin - two heads: one from pisiform bone and volar transverse carpal ligaments

second with flexor digiti quinti brevis from volar transverse carpal ligament

insertion - ulnar side of base of 1st phalanx of digit 5

action - abducts digit 5

Term



Flexor Digiti Quinti Manus

Definition

 

 

 

origin - volar transverse carpal ligament with abductor digiti quinti manus

insertion - ulnar side of base of proximal phalanx of digit 5, with extension of to dorsal surface of digit

action - flexes digit 5

Term



Opponens Digiti Quinti Manus

Definition

 

 

 

origin - volar transverse carpal ligament and some hand bones

insertion - ulnar border of 5th metacarpal bone

action - rotates digit 5

Term



Lumbricales Manus

Definition

 

 

origin - tendons of flexor digitorum profundus

insertion - radial side of basal phalanges of digits 2-5, with extension to dorsal surfaces of digits

action - flex proximal phalanges at metacarpophalangeal joints, while maintaining extension at interphalangeal joints

Term


Contrahentes Digitorum Manus

Definition

 

 

origin - central tendon

insertion - contrahens of digit 5 inserts on radial side of basal phalanx of digit 5; contrahens of digit 4 inserts on radial side of basal phalanx of digit 4; contrahens of digit 2 inserts on ulnar side of basal phalanx of digit 2

action - adducts digits

Term



Interossei Manus

Definition

 

 

 

origin - bases of metacarpal bones

insertion

action - dorsal interossei abducts digits; palmar interossei aid contrahens in adducting digits

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