Nerves of the arm Flashcards
at what point does the subclavian artery turn into the axillary artery? [1]
at what point does the axially artery turn into the brachial artery? [1]
at what point does the subclavian artery turn into the axillary artery? [1]
lateral border of the first rib
at what point does the axially artery turn into the brachial artery? [1]
at point of teres major muscle
at what point does the brachial artery bifurcate into radial and ulnar arteries? [1]
at what point does the brachial artery bifurcate into radial and ulnar arteries? [1]
- at elbow
which arteries, found in the hand, do the ulnar [1] & radius [1] arteries supply?
radial artery gives rise to deep palmar arch
ulnar artery gives rise to superficial palmar arch
collateral vessels are found around joints to allow WHAT?
collateral vessels are found around joints to allow continous blood supply during movement at the joint
where do you find superficial veins in upper limb? [1]
where do you find deep veins in upper limb? [1]
where do you find superficial veins in upper limb? [1]
- superficial fascia
where do you find deep veins in upper limb? [1]
- within the muscular compartments and have same name as their arteires
3 main superficial veins of upper arm? [3]
what is the brachial plexus?
which nerves does it arise from? [5]
what is the brachial plexus?
- major network of nerves which provides sensory and motor innervation to the upper limb
which nerves does it arise from? [5]
C5, C6, C7, C8 & T1
describe overview of whole structure of brachial plexus
roots: C5, C6, C7, C8 & T1
trunks:
C5 & C6 join together: superior
C7 continues solo: middle
C8 & T1 join together: inferior
Divisions:
Anterior
Posterior
- *Cords (**named regarding position to axillary artery):
- lateral (top)
- posterior
- medial (bottom)
- *Branches:**
- *-** top = Muscular cutaneous
- axillary
- median
- radial
- ulnar nerve
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what are the 5 branches of brachial plexus?
- Muscularcutaneous
- axillary
- median
- radial
- ulnar nerve
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What is the best way to id the different nerves?
Musculocutaneous, median & ulnar are anterior to axillary artery & form M shape
Behind axillary artery: **
superior - axillary, inferior - radial**
where do each of the following arrive from?
- Muscularcutaneous
- axillary
- median
- radial
- ulnar nerve
where do each of the following arrive from?
- Muscularcutaneous: C5-C7
- axillary: C5-C6
- median: C5-T1
- radial: C5-T1
- ulnar nerve; C8-T1
median nerve
Musculocutaneous nerve
Which group of muscles does the musculocutaneous nerve supply? [1]
Name the muscles [3]
Where is the sensory area that the musculocutaneous arm supplies? [1]
musculocutanous supplies the flexor compartment motor supply:
- bicep brachialis
- brachialis
- corachbrachialis
musculocutanous supplies the flexor compartment sensory supply:
- skin of lateral forarm
If you did damage the musculocutaneous nerve: what movement would be impeded? [1]
If you did damage the musculocutaneous nerve: problems flexing the arm
Axillary nerve
Which muscles are supplied by axillary nerve? [2]
The axillary nerve provides sensory innervation to skin in which location? [1]
Muscles:
* deltoid
* teres minor
Sensory:
skin over deltoid muscle (regimental patch)
which of the nerves from brachial plexus, if damaged, would result in a loss of shoulder abduction beyond 15 degrees?
- Muscularcutaneous
- axillary
- median
- radial
- ulnar nerve
which of the nerves from brachial plexus, if damaged, would result in a loss of shoulder abduction beyond 15 degrees?
axillary
Median nerve
Describe the path of the median nerve to the hand [3]
Which muscles does median nerve supply motor innervation to? [2]
Which area of skin does median nerve provide sensory innervation for? [1]
Path:
* medial to biceps brachii with the brachial artery
* then runs anteriorly at the cubital fossa to enter the forearm.
* It then passes through the carpal tunnel to reach the hand
Motor:
- supplies the majority of the flexor compartment - wrist flexion
- thumb
Sensory:
-Sensory fibres innervate the skin over lateral palm, digits 1-3.
