S.A. PNS & ANS Flashcards
what makes up the PNS?
cranial & spinal nerves (and their ganglia)
what are ganglia?
groups of neuron cell bodies
are peripheral nerves mostly ,myelinated or unmyelinated?
myelinated
what is a nerve fiber?
a single axon in a peripheral nerve
where are unipolar cells found?
posterior root ganglion
where are bipolar cells found?
retina & sensory ganglia of cochlear & vestibular nerves
what do schwann cells make?
myelin (nodes of ranvier)
Lesser occiput of cervical plexus?
C2, C3- sensory, posterolateral neck
Greater auricular cervical plexus?
C2, C3- sensory: ear & parotid gland
Transverse cervical of cervical plexus?
C2, C3- sensory: ant. & lat neck
Supraclavicular (ant. middle, post.) of cervical plexus?
C3,C4- sensory: shoulder & ant chest
Ansa cervaclis (deep) cervical plexus?
C1-C4; Motor: geniohyoid & infrAHYOID MUSCLES OF NECK
Segmental branches of cervial plexus?
C1-C5; motor: neck & scalenes, levator, trapezius, SCM
Phrenic of cervical plexus?
C3-C5; motor: diaphragm
C3, C4, C5 keep the diaphragm alive
Femoral N of lumbar plexus?
L2-L4; sensory: thigh, leg, foot, hip, knee joint
Motor: ant thigh, psoas, pectineus, iliacus
Obturator N. of lumbar plexus?
L2-L4
Sensory: medial thigh & hip joint
Motor: adductors, gracilis & obturator externus
Lat. femoral cut. of lumbar plexus?
L2, L3
sensory: lat thigh, branches to peritoneum
Iliohypogastric N of lumbar plexus?
L1; sensory: lower abdomen, lower back & hip, anterolateral abdominal wall & pubic region
Ilioinguinal N. of lumbar plexus?
L1; Sensory: external genitalia, thigh & abdominals
Genitofemoral N. of lumbar plexus?
L1,L2; Sensory: scrotum, labia, thigh & cremsater
Sciatic N of sacral plexus?
L4-S3; Motor: tibial & common peroneal
Tibial N. of sacral plexus
L4-S3
sensory: post leg & foot
Motor: all muscles back of thigh, leg & foot
Common peroneal (fibular) N. of sacral plexus?
L4-S2
sensory: ant leg & dorsum of foot
Motor: peroneals, tibialis ant., extension of toe
Superficial peroneal (fibular) N. of sacral plexus?
L4-S2; Motor: lateral comp. of leg
Deep peroneal N. of sacral plexus?
L4-S2; motor: ant. comp.of leg
Superior gluteal N. of sacral plexus?
L4,L5,S1; motor: gluteus minimus & medius, & TFL
Inferior Gluteal N. of sacral plexus?
L5-S2; Motor: gluteus maximus
Pudendal N. of sacral plexus?
S2-S4
Sensory: muscles of perineum
Motor: external anal sphincter
how are the cords of the brachial plexus named?
according to the axillary artery
whats the order of the brachial plexus?
roots trunks divisions cords branches "rugby teams drink cold beer"
what levels make up the roots of brachial plexus?
C5-T1
Rhomboids are supplied by?
Dorsal scapular nerve-C5
Suprascapular N.?
C5,C6- shoulder joint; infraspinatus, supraspinatus
Long thoracic nerve
C5,C6,C7; supplies serratus anterior
subclavius supplied by?
n. to the subclavius- C5
lateral cord is made up of?
C5-C7
lateral pectoral N?
C5-C7 sometimes C8; supplies pec. major
musculocutaneous N.?
C5,C6; supplies: coracobrachialis, bicep brachii, brachialis
Median N.?
C6-C8,T1- sometimes C5
medial brachail cut. N.?
T1- sensory to prox 1/2 of arm
medial antebrachial cut. N.?
C8, T1- sensory to elbow and medial aspect of forearm
Ulnar N.?
C8, T1, sometimes C7
Medial cord made up of?
C8, T1
Posterior cord made up of?
C5-T1
superior subscapular?
C5,C6; supplies subscapularis
inferior subscapularis n.?
C5,C6- supplies subscapularis & teres minor
Axillary N.?
C5,C6- supplies deltoid, teres minor; shoulder joint
Radial N.?
c6-T1, sometimes C5
CN I name? path? fxn? nuclei & ganglion?
Olfactory
cribriform plate
smell
does NOT synapse- thalamus
CN II name? path? fxn?
optic
optic canal
vision
CN III name? path? fxn? nuclei?
oculomotor
superior orbital fissure (SOF)
Motor- eye muscles except lat. rectus & sup. oblique
edinger-westphal
CN IV name? path? fxn?
trochlear
superior orbital fissure (SOF)
motor- superior oblique
smallest CN
CN V name? path? fxn? nuclei/ganglion?
Trigeminal
V1- opthalmic; V2- maxillary; V3- mandibular
V1-SOF; V2- foramen rotundum; V3- Foramen ovale
Sensory- face & tongue
Motor- mastication (tic douloureux)
trigeminal ganglion “trigeminal neuralgia”
Largest CN
CN VI name? path? fxn?
Abducens
SOF
motor- lateral rectus
CN VII name? path? fxn? nuclei/ganglion?
facial internal auditory meatus, exits thru the styloid mastoid sensory-ant 2/3 taste motor- facial expression superior salvatory "bells palsy"
CN VIII name? path? fxn? nuclei/ganglion?
vestibular- cochlear
internal auditory meatus
sensory- balance & hearing
vestibular ganglion (of scarpa)
CN IX name? path? fxn? nuclei?
glossopharyngeal jugular foramen sensory- post 1/3 taste motor- stylopharyngeus- secretion of parotid gland nucleus ambiguus (inf. salvatory)
CN X name? path? fxn? nuclei?
Vagus jugular foramen motor pharynx, larynx sensory- bitter taste epiglottis, ext. auditory meatus parasym. dorsal motor nucleus
CN XI name? path? fxn? nuclei?
accessory
jugular foramen
motor SCM & trapezius
Nucleus ambiguus
CN XII name? path? fxn? nuclei?
hypoglossal
hypoglossal canal
motor- tongue
hypoglssal nuclei
ANS innervates?
involuntary structures such as heart, smooth muscle, glands
Sympathetic Axons include? Short? Long?
T1-L1/L2
Short: PREganglionic; NT-ACH
Long: POSTganglionic; NT-EPI/NE
Parasympathetic axons include? Short? Long?
CN III,VII, IX,X; sacral S2-S4
Long: PREganglionic; NT-ACH
Short: POSTganglionic; NT-ACH
