Assessments Unit 2 Nerves Flashcards
Where is the cervical plexus?
In the prevertebral layer of cervical fascia of C1-C4
Why would you block the stellate ganglion?
To block sympathetic impulses
What causes Horner’s syndrome?
Phrenic nerve blockade, which is blockaded by the stellate ganglion
At what levels could you do an interscalene block?
C5-7
What levels would you find the brachial plexus?
C5-T1
What nerve innervates the shoulder?
Supraclavicular (C3-C4)
What nerve innervates the deltoid muscles?
The axillary and superior lateral cutaneousnerve C5/6
What nerve gives rise to the upper lateral cutaneous nerve?
The axillary nerve
What innervates the muscles in the anterior compartment of the arm and innervates the sensory functions of the lateral aspect of the forearm?
Musculocutaneous nerve C5-7.
What innervates the flexor/pronator muscles in the anterior compartment of the forearm and innervates sensory function to the palmar cutaneous branch which then innervates the lateral aspect of the palm?
The median nerve C6-T1
What innervates the triceps and extensor muscles in the forearm, and provides sensory innervation to the posterior forearm, lateral dorsum of the hand and the dorsal surface of the lateral three and a half digits?
The radial nerve C5-T1
What innervates the flexor carpi ulnaris and medial half of flexor digitorom and provides sensory innervation to the medial one and a half fingers and the palm?
Ulnar nerve C8-T1
Where is the lumbar plexus?
L1-L4
Pneumonic to remember the nerves of the lumbar plexus?
I I Get Leftovers On Fridays
Iliohypogastric,Ilioinguinal,Genito-femoral,Lateral cutaneousnerve of the thigh,ObturatorandFemoral
What nerves make up the brachial plexus?
Musculocutaneous, axillary, median, ulnar, radial, medial antebrachial cutaneous, medial brachial cutaneous
What does the iliohypogastric innervate?
The internal oblique and transverus abdominus L1 (some of it does branch down from T12). Does provide sensory for the gluteal and pubic regions
What does the lateral femoral cutaneous innervate?
The anterior and lateral thigh down to the level of the knee, L2/3. All sensory, no motor function
What does the obturator innervate?
the muscles and skin of the medial thigh L2-4. Both sensory and motor. Sensory is the skin over the medial thigh.
What does the femoral nerve innervate?
The muscles of the anterior thigh and the skin of the anterior thigh and medial leg. Motor and sensory. L2-4
Where would you find the sacral plexus?
S1-4, though it does receive contributions from L4-5
What does the sciatic nerve innervate?
Directly innervates muscles of the posterior thigh and indirectly innervates all muscles of the leg/foot. No directly sensory function though does have indirect sensory function of the lateral leg, heel and foot
What innervates the axillary region?
The axillary nerve C5/6
What is the sensory/motor function of the axillary nerve?
Sensory: the upper lateral cutaneous nerve of the arm, innervating the skin of the lower deltoid
Motor: the teres minor and deltoid muscles
C5/6
What is the sensory/motor function of the musculocutaneous nerve?
Sensory: gives rise to the lateral cutaneous nerve of forearm and innervates the lateral aspect of the forearm
Motor: muscles in the anterior compartment of the arm (coracobrachialis, biceps and the brachialis)
C5-7
What is the sensory/motor function of the median nerve?
Sensory: gives rise to the palmar cutaneous branch which innervates the lateral aspect of the palm and digital cutaneous branch -> the lateral three and a half fingers on the anterior (palmar) surface of the hand
Motor: muscles in the anterior compartment of the forearm (except the flexor carpi ulnaris and flexor digitorum), also innervate the thenar muscles and lateral two lumbricals in the hand
C6-T1
What is the sensory/motor function of the radial nerve?
Sensory: innervates most of the skin of the posterior forearm, lateral aspect of the dorsum of the hand and dorsal surface of the lateral three and a half digits
Motor: triceps brachii and extensor muscles in the forearm
C5-T1
What is the sensory/motor function of the ulnar nerve?
Sensory: medial one and a half fingers and the associated palm area
Motor: the flexor carpi ulnaris and medial half of the digitorum profundus, intrinsic muscles of the hand
C8-T1
What innervate the internal oblique and transversus abdominus muscles and provide sensory innervation to skin on the superior antero-medial thigh and genital area?
Ilioinguinal
L1
