Chpt 13 Pt 3: Spinal Cord

ANTERIOR GRAY HORN

polio attacks the ____ of the spinal cord

membranes

remember, words ending in -ium or -lema relate to ____

to, from

sensory neurons go TO/FROM the CNS TO/FROM an affector (receptor)

white matter, POSTERIOR GRAY HORN, INTER, white, POSTERIOR GRAY HORN, A SOMATIC MOTOR

sensory neurons going to the spinal cord can take 3 paths: (1) into the ____ then to the brain; (2) into the _____ through an ____ neuron into the ___ matter and then up to the brain; (3) into the ____ and synapse with _____ neuron involved in spinal reflex

SHOCK ABSORBER and ION EXCHANGER

the CSF functions as a ____ and an ____

CENTRAL CANAL, BRAIN VENTRICLES and ARACHNOID SPACE

the CSF is found in the _____, ______ and ______

FILTRATION OF THE BLOOD

the CSF is made from ______

descending

the DESCENDING/ASCENDING tracts in the spinal cord are motor.

ascending

the DESCENDING/ASCENDING tracts in the spinal cord are sensory

white

the GRAY/WHITE matter in the spinal cord consists mainly of myelinated axons.

FILUM TERMINALE, CAUDA EQUINE

the ____ and ____ arise from the conus medularis

ANTERIOR MEDIAN FISSURE, POSTERIOR MEDIAN SULCUS

the _____ and _____ partially divide the spinal cord into right and left sides

ANTERIOR GRAY HORNS

the _______ contain cell bodies of the somatic motor neurons.

POSTERIOR (DORSAL) GANGLION

the _______ contains cell bodies of incoming sensory neurons to the CNS

TRACTS

the bundles of axons in the white matter of the spinal cord are called ____

biggest, LIMBS, biggest, more

the gray matter at the top of the spinal cord is SMALLEST/BIGGEST because these nerves serve the ___. the white matter in the upper spinal cord is SMALLEST/BIGGEST because there are FEWER/MORE tracts in the upper spinal cord.

GRAY COMMISSURE

the gray matter forms a letter H and the crossbar of the H is called the ______

CELL BODIES, UNMYELINATED AXONS, DENDRITES, AND NEUROGLIA

the gray matter in the spinal cord consists mainly of ____, ______, _____ and ______.

white, median fissure, median sulcus

the groves in the spinal cord's GRAY/WHITE matter that divide it into right and left sides are called the anterior ______ and the posterior ____

THORACIC AND UPPER LUMBAR (i.e. the middle of the spinal column)

the lateral gray horns are present only in the ______ SEGMENTS

AUTONOMIC MOTOR NUCLEI

the lateral gray horns contain ______ which regulate the CARDIAC AND SMOOTH MUSCLES AND GLANDS

INTERNEURONS (ASSOCIATION NEURONS), SENSORY NEURONS

the posterior gray horns (in the gray matter) have CELL BODIES AND AXONS OF ____ and AXONS OF ____

ANTERIOR GREY HORN, ANTERIOR ROOT, effector

the somatic motor neurons leave the spinal column through the _____ in the spinal cord, then through the _____ to enter the spinal nerve which finally go to the ____.

does not

the spinal cord DOES/DOES NOT have lateral grey horn throughout its length

the limbs

the spinal enlargements are points of origin for nerves to ___ part of body

PERIPHERAL

the spinal nerves are in the _____ nervous system

SENSORY RECEPTORS, MUSCLES, and GLANDS

the spinal nerves connect the CNS to ____ , ____ and _____ all over the body

central canal, CSF

the the channel (hole cross section) in the gray commissure is the ____that contains ____

white commissure

the white matter directly anterior to the gray commissure is called the _____

SOMATIC MOTOR

_____ _____ neurons (cell bodies of which are found in the anterior gray horns) provide nerve impulses for CONTRACTION of SKELETAL MUSCLES.

ANTERIOR ROOT, SPINAL NERVE, (2nd) AUTONOMIC MOTOR NEURON, PNS

after the autonomic motor neuron leaves the gray horns (spinal cord) it goes through the ____, and enters the _____ before synapsing with a _____, this time in the CNS/PNS reaching the effector.

SMOOTH OR CARDIAC, glands, LATERAL GRAY HORN, ANTERIOR GRAY HORN

autonomic motor neurons of the spinal cord (which start impulses that ultimately go to ______ muscle or ___) first go from the _____ in the spinal cord to the ____

AXONS

bundles of ____ in the CNS are called tracts

AXONS

bundles of ____ in the PNS are called nerves

TRACTS

bundles of axons in the CNS are called ____

NERVES

bundles of axons in the PNS are called ____

NUCLEI

clusters of neuron cell bodies in the CNS are called _____

effector

motor or efferent neurons go to an _____

white, somatic motor, interneurons, somatic motor

motor output from the brain goes through the GRAY/WHITE matter of the spinal cord and either synapse directly with ____ neurons or indirectly through _____ which then synapse with _____ neurons

somatic motor, ANTERIOR GRAY HORN

motor output from the spinal cord to skeletal muscles involve _____ neurons of the _____ area of the spinal cord.

thicker, added to, top, leave, gray matter, down

the white matter is THINNER/THICKER in the upper spinal cord for 2 reasons: (1) sensory neurons are TAKEN AWAY/ADDED TO at the ___ of the spinal cord and (3) motor neurons ___ the white matter going into the ____ as they go UP/DOWN the spinal cord.

columns, horns

the white matter is divided into ___ and the gray matter into _____

3, ANTERIOR (VENTRAL), POSTERIOR (DORSAL) AND LATERAL COLUMNS

the white matter is divided into ___ columns: called the ______