A&PII: Lab 2: PNS

spinal accessory n. XI (motor)

sternocleidomastoid n trapezius muscles

hypoglossal n. XII (motor)

muscles of tongue

vagus nerve X (motor n sensory)

motor n sensory fibers to the visceral body organs

vagus nerve X (motor n sensory) pathology

clinical manifestations may include dysphagia, vocal cord weakness n alterations of the parasympathetic tone of the thorax n abdomen

infraorbital nerve

lower eyelid n upper lip;infraorbital canal

phrenic nerve

diaphragm muscles to control breathing; both phrenic nerves run from C3-C5 along the anterior scalene muscle before diving into the thorax to pass btwn lungs n heart

suprascapular nerve

supraspinatus n infraspinatus muscles; suprascapular notch of the scapula

subscapular nerves

subscapularis, teres major n latissimus dorsi muscles

axillary nerve

deltoid n teres minor muscles

musculocutaneous nerve

coracobrachialis, biceps brachii, n brachialis muscles

radial nerve

triceps brachii n all muscles of the posterior forearm, sensation to lateral posterior surface of the hand; radial groove of the humerus bone

radial nerve pathology

when dmged, an individual cannot draw their wrist up n thus this condition is referred to as wrist drop

median nerve

sensation to the lateral anterior hand

median nerve pathology

carpal tunnel syndrome is generally associated w compression of this nerve

ulnar nerve

sensation to the anterior n posterior medial hand; behind the medial epicondyle of the humerus

ulnar nerve pathology

superficial n thus often exposed to contact stimulation n pain in the “funny bone”

long thoracic nerve

serratus anterior muscle

long thoracic nerve pathology

when this nerve is dmged, the scapula wings out as it can no longer be held against the body wall

sciatic nerve

biceps femoris, semitendinosus n semimembranosus muscles; greater sciatic notch of the pelvis

tibial nerve

gastrocnemius, soleus n plantaris muscles

common fibular nerve

anterior muscles of the leg (not thigh)c

common fibular nerve pathway

when dmged, muscles in the posterior leg are no longer antagonized by contracting muscles from the anterior leg resulting in an unsynchronized foot drop w each step

femoral nerve

rectus femoris, vastus medialis, vastus lateralis, n vastus intermedius muscles

lateral cutaneous nerve

sensation to the lateral thigh

obturator nerve

sensation to the medial thigh; obturator foramen of the hip

saphenous nerve

sensation to the medial leg n medial ankle/foot

sympathetic trunk n ganglia

distributes fibers thru the ramus communicans for sympathetic influence into spinal nerves