MSK Flashcards
What are the 5 superior muscles of the forearm and what are there functions?
Pronator teres - Pronates forearm Flexor carpi radialis - Flex wrist Flexor carpi ulnaris - Flex wrist Palmaris longus - Flex wrist Flexor digitorum superficialis - Flex digits
What is the common flexor origin of muscles of the forearm?
Medial epicondyle of humerus
What is the function of the brachioradialis and what is it innervated by?
Flexor of the elbow and the radial N
What are the branches of the brachial A and where does it bifurcate?
Ulnar and radial N - Cubital fossa
What are the 3 deep muscles of the forearm?
Flexor pollicis longus Flexor digitorum profundus Pronator quadratus (transverse)
What muscles of the forearm does the median N supply?
All except medial 1/2 of flexor digitorum profundus & flexor carpi ulnaris (which are supplied by ulnar N)
What connects the radius and ulna?
Interosseus membrane
What is the innervation of the front of the forearm?
All supplied by median N except flexor carpi ulnaris, medial 1/2 of the flexor digitorum profundus and the brachioradialis
What is the brachioradialis innervated by?
Radial N
What are the flexor carpi ulnaris and medial 1/2 of the flexor digitorum profundus innervated by?
Ulnar N
What does the carpal tunnel contain?
Median N & Tendons of the: Flexor digitorum superficialis Flexor digitorum profundus Flexor pollicus longus
What are the thenar muscles supplied by?
Median N
What is the superficial palmar arch?
Termination of the ulnar A
What are the medial 1 1/2 fingers innervated by?
Ulnar N
What are the lateral 3 1/2 fingers innervated by?
Median N
What hand muscles does the median N innervate?
3 thenar muscles & 2 lateral lumbrical muscles (all others supplied by ulnar)
What are the 3 thinner muscles? and what are they innervated by?
Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis
Median N
What is the adductor pollicis innervated by?
Ulnar N
What are the 3 hypothenar muscles and what are they innervated by?
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Ulnar N
What are the 2 lateral lumbrical muscles innervated by?
median N
What are the 2 medial lumbrical muscles innervated by?
Ulnar N
What is the function of the palmar interossei?
Adducts fingers (P-AD)
What is the function of the dorsal interossei?
Abducts fingers (D-AB)
Is the flexor digitorum superficialis inserted into the phalanges proximally or distally?
Proximally (spilts)
Is the flexor digitorum profundus inserted into the phalanges proximally or distally?
Distally (doesn’t split)
What are the functions of the biceps brachii?
Forearm supination & flexion
How many carpal bones are there?
8
What carpal bone articulates w/ the radius?
Scaphoid
How many metacarpal bones are there?
5
How many phalanges are there in the fingers and thumb?
3 in each finger and 2 in each thumb
What is the pectoralis major innervated by and what cord of the brachial plexus do they originate from?
Medial and lateral pectoral nerves (med and lateral cords)
What is the pectoralis minor innervated by and what cord of the brachial plexus does it originate from?
Medial pectoral N (medial cord)
What nerve are the extensors of the forearm innervated by?
Radial N
What nerves innervate the flexors of the forearm?
medial and ulnar N
What 3 things does the cubital fossa contain?
brachial A, median N and bicep tendon
What roots of the brachial plexus contribute to the radial N?
All (c5, c6, c7, c8, t1)
What roots of the brachial plexus contribute to the axillary N?
c5 and c6
What roots of the brachial plexus contribute to the musclutocutaneous N?
c5, c6 and c7
What roots of the brachial plexus contribute to the median N?
c6, c7, c8 and t1
What roots of the brachial plexus contribute to the ulnar N?
c8 and t1
What muscle morphology has the greatest power?
Multipennate
What muscle morphology can pull the furthest distance?
Strap
