week 2 nervous system

olfactory nerve (CN I)

bq only: there are about 20 olfactory nerves

optic nerve (CN II)

where the optic canal is

oculomotor nerve (CN III)

in middle of sella turcica

trochlear nerve (CN IV)

lateral/inferior to sella turcica

trigeminal nerve (CN V)

chunk/ flap on petrous portion. either side

Ophthalmic nerve (cn v1)

most medial. lateral to sella turcica

maxillary nerve (v2)

intermediate pin. lateral to sella turcica

mandibular nerve (v3)

most lateral pin. lateral to sella turcica

frontal nerve

the Y nerve

supraorbital nerve

the lateral split of Y

supratrochlear nerve

medial split of Y

buccal nerve

most superior pin on cheek

lingual nerve

intermediate pin on cheek

inferior alveolar nerve

most inferior cut up nerve

abducens nerve (CN VI)

skinny hanging nerve below petrous portion on the right side

facial nerve (CN VII)

little one on petrous portion chunk closer to petrous right above hook

vestibulocochlear nerve (cn VIII)

hooked shaped one. wormy

vestibular nerve

bq only: transmits information concerning equilibrium and motion

cochlear nerve

bq only: transmits information concerning hearing

glossopharyngeal nerve (cn IX)

anterior to vestibulocochlear nerve. hanging/shredded nerve behind hook

vagus nerve (CN X)

not dissected out. behind glossopharyngeal goes into spinal cavity

vagus nerve (CN X)

near aorta

recurrent laryngeal nerve

in between aorta and pulmonary artery

spinal accessory nerve (CN XI)

deepest. near the spinal cord

hypoglossal nerve (CN XII)

lateral side of foramen magnum

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Mneumonic for cranial nerves in order

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Mneumonic for cranial nerve functions in order

great auricular nerve

bq only: sensory to external ear and skin in front of it

phrenic nerve

BQ only: C-3, C-4, C-5 keep the diaphragm alive

C-5 roots

c-6 roots

c-7 roots

c-8 roots

t-1 roots

dorsal scapular nerve

braches

thin nerve in between c-5 and c-6 roots

long thoracic nerve

thin band near serratus anterior

Upper trunk

body of C-5 and C-6

middle trunk

body of C-7

lower trunk

body of c-8 and t-1

suprascapular nerve

posterior side of upper trunk

anterior divisions

above probe

posterior divisions

below probe

lateral cord

cord. lays laterally, made up of anterior divisions of c-5, c-6, and c-7

medial cord

most inferior. anterior divisions of c-8 and t-1

posterior cord

deep to other cords

lateral pectoral nerve

only shown on right side. underneath pectorialis major.

musculocutaneous nerve of the lateral cord:supplies biceps brachii, brachialis, and coracobrachialis

comes off the lateral cord

lateral root of median nerve

the lateral split

medial pectoral nerve

left side under pectoralis

medial cutaneous nerves

most medial “ponytail”

medial root of median nerve

middle part of the M

ulnar nerve: is the funny bone

most medial. The medial M

thoracodorsal nerve

1 (from posterior cord)

lower subscapular nerves

2 (from posterior cord)

upper subscapular nerves

3 ( from posterior cord)

axillary nerve

supplies deltoid and teres minor

radial nerve of the posterior cord

median nerve

middle of M both roots connect

intercostal nerves

small strip in rib cage

anterior cutaneous branches of the intercostal nerves

only shown on rib plate

subcostal nerve

1) under rib cage lateral/inferior to kidney

iliohypogastric nerve

2) inferior to subcostal nerve

ilioinguinal nerve

3) inferior to iliohypogastric

genitofemoral nerve

5) most anterior connects to skin

lateral femoral cutaneous nerve

4) inferior/medial to ilioinguinal

obturator nerve

7) right left. connects to ilium bone

femoral nerve

6) lateral to psoas major

saphenous nerve

6) only term in leg. splits from femoral nerve

lumbosacral trunk

union. where the nerves meet near sacrum bone.

superior gluteal nerve:supplies gluteus medius and minimus

goes into the gluteus medius

inferior gluteal nerve: supplies gluteus maximus

small cut nerve

posterior femoral cutaneous nerve

long skinny, stringy cut nerve

pudendal nerve

inferior to sacrum butt area

sciatic nerve:largest nerve in the body

before it splits connects to gastrocnemius

common fibular nerve

pruple. lateral split on left side

superficial fibular nerve

blue. on top of gastrocnemius, thin/skinny

deep fibular nerve

green. goes deep into gastrocnmenius

tibial nerve

blue. medial split on right leg

sural nerve

cut nerves by knee

medial plantar nerves

lateral plantar nerves

more posterior

anosmia

the loss of smell

bell’s palsy

unilateral paralysis of the muscles supplied by the facial nerve- most prominently the muscles of facial expression

brachial plexus palsy

muscle weakness or paralysis and/or loss of senation in the upper limb caused by an injury to the brachial plexus

erb’s palsy

most well-known palsy of infants- also called obstetrical brachial plexus palsy-caused by stretching or tearing of the upper trunk during delivery of an infant

dental anesthesia

administration of an anesthetic agent to block pain during dental procedures

inferior alveolar nerve block

anestehtizes the lower teeth, as well as the lower lip and chin

herpes zoster (shingles)

viral infection of the spinal ganglia (dorsal root ganglia) of spinal nerves (or sensory ganglia of cranial nerves)

neuralgia

general term for “nerve pain” - usually sharp throbbing pain that follows the distribution of a nerve.

paresthesia

feeling of “pins and needles” such as when part of the body falls asleep

pudendal nerve block

done to provide pain relief during the later stages of childbirth when the lower vagina and perineum are stretched by presentations of the baby’s head

sciatica

pain that radiates along the course of the sciatic nerve-from the buttocks down the posterior thigh

stingers

common injuries in contact sports such as football caused by violent stretching of the brachial plexus