ASCENDING TRACTS

CARRY SENSORY SIGNALS UP THE SPINAL CORD.

CAUDA EQUINA

BUNDLE OF NERVE ROOTS

L2-S5

CONTRALATERAL

ORGIN & DESTINATIONN ARE ON OPPOSITE SIDES

DECUSSATION

FIBERS CROSS OVER FROM L TO R OR R TO L SIDE OF THE BODY

DENTICULATE LIGAMENTS

EXTENSIONS OF A PIA MATER, EXTENDS THROUGH ARACHMOID TO DURA MATER, ANCHOR SP CORD & PREVENTS SIDE TO SIDE MOV'T.

DESENDING TRACTS

CARRY MOTOR SIGNALS DOWN TO BRAINSTEM

GANGLION

CLUSTER OF DIFFERENT NEUROSOMAS (NERVE CELL BODIES) OUTSIDE THE CNS IN THE PNS. ENVELPOED IN AN ENDOEURIUM CON'T WITH THAT OF THE NERVE CELL.

GRAY MATER

SPINAL CORD LOOKS LIKE A BUTTERFLY SITE OF ALL SYNAPTIC CONTACT BETWEEN NEURONS & SYNAPTIC INTEGRATION (INFO PROCESSING) IN CNS

IPOILATERAL

ORGIN & DESTINATION ON A SAME SIDE

MEDULLARY CONE

TAPPERED TIP OF SOINAL CORD

MENINGES

APINAL CORD & BRAIN ENCLOSED IN THEIR FIBOROUS MEMBRANES

MOTOR FIBERS

CARRY SIGNALS FROM THE CNS TO THE MUSCLES & GLANDS

SENSORY FIBERS

FIBERS CARRY SIGNALS FROM SENSORY RECEPTORS

TERMINAL FILUM

FIBOROUS STRAND THAT IS A CONTINUATION OF A PIA MATER

WHITE MATER

BUNDLES OF MYLIENTED AXINS CALLED TRACTS THAT CARRY SIGNALS UP & DOWN THE CNS

OLFACTORY

SMELLING

OPTIC

VISION

OCULOMOTOR

EYE MOV'T OPENING OF EYELID, CONSTRICTION OF PUPIL FOCUSING, PROPRICEPTION

TROCHLEAR

EYE MOV'T, PROPRIOCEPTION

TRIGEMINAL

PROVIDES SENSORY INFO TO THE FACE FOR TOUCH, PAIN, TEMP., & INNERVATES THE MUSCLE OF MASTIFICATION

ABDUCENS NERVE

PROVIDES EYE MOV'T (NOT EYE LID)

FACIAL

PROVIDES EXPRESSIONS, SENSE OF TASTE ON ANTERIOR 2/3'S OF TONGUE, SECRETION FROM SALIVARY & TEAR, NASAL & PALATINE GLAND

VESTIBULOCHLEAR

HEARING & SENSE OF BALANCE

VAGUS

PROVIDES SWALLOWING, TASTE, SPEECH, PULMONARY CARDIOVASCULAR, & GASTROINTESTIONAL REGULATION, SENSATIONS OF HUNGER, FULLNESS, & INTESTINAL DISCOMFORT

GLOSSOPHARYNGEAL

PROVIDES CONTROL OVER SWALLOWING, SALIVATION, GAGGING, SENSATIONS FRO POSTERIOR 1/3 TONGUE CONTROL OF BP & RESPIRATIONS

ACCESSORY

PROVIDES SWALLOWING, HEAD, NECK, & SHOULDER MOV'T

HYPOGLOSSAL

PROVDIES TONGUE MOV'T OF SPEECG, FOOD, MANIPULATION & SWALLOWING

WHAT IS SCIATICA?

SHARP PAIN THAT TRAVLES FROM GLUTEAL REGION ALONG THE POSTERIOR SIDE OF THE THIGH & LEG TO ANKLE

SCIATIC NERVE INJURY: TIBIAL & COMMON FIBULAR NERVE TRAVEL TOGTHER IN A CONNECTIVE TISSUE SHEATH & ARE COLLECTIVELY CALLED SCIATIC NERVE

CAUSES OF SCIATICA?

90% OF RESULTS FROM HERNIATED INVERTEBRAL DISC OR OSTEOPOROSIS OF LOWER SPINE

RADIAL NERVE INJURY: PASSES THROUGH AXILLA CRUTCH PARALYSIS, WRIST DROP

WHO IS LIKELY TO GET SCIATICA

MEN ARE SUSCEPTIBLE B-C OF THEIR WALLET IN REAR POCKET

RELFEX

MOTOR RESPONSE TO STIMULUS WITHOUT CONSCIOUS THOUGHT.

RECEPTOR

STRUCTURE THAT RECEIEVES THE STIMULUS & CONVERTS IT TO AN ACTION POTIENTIAL

AFFERENT (SENSORY) NUERON

THE NEURON TAKING THE STIMULUS TO THE CNS

INTEGRATING CENTER

BRAIN & SPINAL CORD

EFFERENT (MOTOR) NERVE

THE NEURON TAKING THE RESPONSE FROM THE CNS

EFFECTOR

THE STRUCTURE CAUSING AN EFFECT