upper limb Flashcards
Boundaries of the Axilla
Anterior- pectoralis major and minor
Posterior- subscapularis
medial wall- thoracic wall and serattus ant.
Lateral wall- intertubercular groove
contents of the axilla
- axillary artery
- axillary vein
- bicep brachi
- coracobrachialis
- brachial plexus
where does the axillary artery start
it is a continuation of the sublavian and starts at the level of the 1st rib
nerve roots of brachial plexus
C5-T1
what are the nerve roots of the upper trunk
C5,6
what are the nerve roots of the medial trunk
C7
what are the nerve roots of the lower trunk
C8-T1
what is the posterior cord formed of?
posterior sections from all the trunk
nerve root value of C5-T1
the medial cord contains?
this contains the anterior section of the lower trunk
root value C8-T1
the lateral cord contains?
This contains the anterior section of the upper and middle trunk
root value C5-7
what are the branches of the lateral cord?
Musculocutaneous
lateral root of median nerve
branches of the medial cord?
Medial root of the median nerve
Ulnar nerve
Braches of the posterior cord?
Radial nerve
Axillary nerve
what does the musculotaneous nerve innervate?
Motor- musles of anterior arm
Sensory - lateral aspect of the forearm (lateral cutaneous nerve)
what does the median nerve supply?
Motor- flexors and pronators of the forearm (excluding the FDP and the FCU), thenar muscles and lateral 2 lumbricals.
Sensory- lateral aspect of the palm
What does the ulnar nerve supply?
Motor- Flexor carpi ulnaris and FDP and intrinsic muscles of the hand
Sensory- palm medial 1 and half digits and palmar aspect and dorsum of same region
(C8-T1)
Axillary nerve supplies?
Motor- teres major and minor, deltoid
sensory- regimental badge area
(C5-6)
Radial nerve supplies
Motor- tricep brachii, extensor muscles of forearm
Sensory- posterior forearm, top of lateral 3.5 digits
where is the median nerve most susceptible to damage
the elbow
what palsy arises if there is damage of the axillary nerve
erb’s palsy (shoulder distosia)
where do you test for sensation of axillary nerve
regimental badge region
where is the radial nerve most likely to be damaged
the axilla and in radial groove
where is the ulnar nerve most likely to get damaged
at the elbow
what is the name of the communicating vein between the basillic and the cephalic
the median cubital vein