All upper limb anatomy Flashcards
what muscles make up the quadrangular space (medial, lateral, superior, inferior?
medial-long head of triceps brachii
lateral-surgical neck of humerus
superior-teres minor and subscapularis
inferior-teres major
what space do the axillary nerve and posterior circumflex artery pass through?
quadrangular space
the axillary nerve terminates into what two branches?
anterior and posterior branch
what does the anterior branch of the axillary nerve do?
provide motor innervation to deltoid MAD (motor, anterior, deltoid)
what does the posterior branch of the axillary nerve do?
- motor innervation of teres minor
- sensory innervation of inferior part of deltoid
After innervating the motor function of teres minor, what does the posterior branch of the axillary nerve continue as?
upper lateral cutaneous nerve of the arm
what is the specific name of the area that the upper lateral cutaneous nerve of the arm innervates?
regimental badge
what nerve innervates the lateral aspect of the forearm and which nerve of the brachial plexus does it derive from?
- lateral cutaneous nerve of the forearm
- musculocutaneus
what branch of the median nerve supplies the deep muscles of the anterior forearm?
-anterior interosseous nerve
what branch of the median nerve does not pass through the carpal tunnel?
palmar cutaneous nerve
what does the recurrent branch of the median nerve innervate?
thenar muscles
what does the palmar digital branch of the median nerve innervate?
- innervates 3 and a half fingers
- lateral 2 lumbricals
what does the palmar digital cutaneous branch of the median nerve innervate?
- lateral 3 and a half digits on palmar side
- half of lateral 3 and a half digits on dorsal side
Superficial and deep radial nerve branches. Which one is sensory and which one is motor innervation?
superficial=sensory
deep=motor
what are the names of the 4 branches of the radial nerve that provide sensory innervation and which areas do they innervate?
- lower lateral cutaneous nerve of the arm
- posterior cutaneous nerve of arm
- posterior cutaneous nerve of forearm
- superficial branch-lateral part of dorsal hand and 3 and a half lateral fingers
Radial nerve damage in the axilla-motor and sensory loss?
yes
Radial nerve damage in the radial groove. Does it fully damage triceps brachii? What happens in sensory innervation?
- no, only partially
- only superficial branch out of 4 cutaneous nerves affected as other branches already arisen. Loss of hand innervation
Name 2 other injuries of radial nerve besides axilla and radial groove injuries.
- deep branch injury (motor loss)
- superficial branch injury (sensory loss)
In superficial and deep branch of radial nerve injuries, how do they occur and what happens?
-superficial=laceration or stabbing
-deep=radial head fracture
Sensory-hand innervation lost
Motor-post forearm muscles affected, however ECRL is strong extensor and isnt affected so WRIST DROP does NOT occur
name the 3 branches of the ulna nerve and state what sensory innervation they carry out.
- palmar cutaneous branch-palm of palmar surface
- dorsal cutaneous branch-dorsal medial one and a half fingers and palm area
- superficial branch-palmar medial one and a half fingers
what type of joint is the acromioclavicular joint?
plane
what are the articular surfaces of the AC joint covered with?
fibrocartilage
name the 3 ligaments involved with the AC and group together 2 of them to give them a collective name.
- acromioclavicular
- trapezoid
- conoid
- trapezoid and conoid make up coracoclavicular
Name the 2 arteries that supply the AC joint. Where does each artery arise from?
suprascapular artery-subclavian from thyrocervical trunk
thoraco-acromial artery -axillary artery
what 2 nerves innervate the acromioclavicular joint?
- lateral pectoral nerve
- suprascapular
what type of joint is the sternoclavicular joint?
saddle
what are the articular surfaces of the SC joint covered with?
fibrocartilage
name the 4 major ligaments of the SC joint.
post and ant sternoclavicular
costoclavicular
interclavicular