week 2 anatomy Flashcards
the axillary artery is separated in to ____ parts by _____
three parts, teres minor
the axillary lymph noes drain 75% of the lymph from the breast and so may swell in cancer
sentinel nodes
parts of the brachial plexus
-roots
-trunks
-divisions
-cords
-branches
what nerves are apart of the M?
unlar n
medial n
musculocutaneous n.
what are the names of the cords in the brachial plexus
medial cord
posterior cord
lateral cord
terminal branches of the brachial plexus
-lateral pectoral n.
-medial pectoral n.
-medial cutaneous nerve of the forearm
-medial cutaneous nerve of the arm
- upper subscapular n
-lower subscapular n
-thoracodorsal n
what does the axillary nerve supply?
- teres minor m
-deltoid m
posterior compartment of the arm and extensor muscles in the forearm
innervate most of the skin of the posterior forearm , and the dorsal surface of the lateral three and a half didgits
radial nerve
flexor and pronator muscles in the anterior compaprment of the forearm with exceptions. thenar muscles and later two lumbricals in the hand
sensation to the lateral aspect of the palm, lateral three and a half fingers on the anterior surface of the hand
median n
funny bone sensation
intrinsic muscles of the hand (apart from the thenar muscles and two lateral lumbricals)
sensation to the medial one and half fingers and the associated palm area
ulnar nerve
parts of the humeral head
-greater tubercle
-intertubercular sulcus
- lesser tubercule
-radial groove
parts of the anterior view of the distal end of the humerus
(lateral side)
-radial fossa
-capitulum
(medial side)
-coronoid fossa
-trochlea
parts of the posterior view of the distal end of the humerus
-olecranon fossa
-trochlea
parts of the top of the ulna
-olecranon
-trochlear notch
-coronoid process
-radial notch
parts of the top of the radius
-head
-neck
parts of the elbow joint
-radial and annular collateral ligament of the radius
-joint capsule
-ulnar collateral ligament
-quadrate ligament
if sub-location of the elbow occurs what is happening
the radius is slipping out of the radial (vertical) ligament and the annular ligament (horizontal)
movement of the elbow:
bringing the forearm up
flexion
movement of the elbow:
bringing the forearm down
extension
pronation
hands down (crossing)
supination
hands up
parts of the distal end of the radius
-radial styloid process
(end is lager than the head)
articulates with the carpal bones
- can be fractured easy
parts of the end of the radius that articulates with the carpal bones
- scaphoid (carpai articular surface)
-lunate (carpal articular surface)
moving the hand up ( loose skin at wrist)
extension of the wrist
movement of the hand down (tight skin at the wrist)
flexion
bones of the hand and wrist
(wrist to tips)
-carpels
-metacarpals
-proximal phalanges
-middles phalanges
-distal phalanges
joints of the hand
wrist to tips
-radiocarpal joint (between radius/ulna and carpal bones)
-intercarpal joint
-carpometacarpal joint (CMC) (wrist and palm)
-metacarpophalangeal joint (mp)
-interphalangeal joint (thumb)
-proximal and distal interphalangeal joints
extends superiorly across the anterior concavity of the carpal bones and forms the roof of the carpal tunnel
flexor retinaculum
spans laterally from the anterior radius to the psiform and triquetrum carpal bones medially
extensor retinaculum
