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BIO 260/ CHP 14

BIO 260/BRULTE/MARTININ/CHP 14 SPINAL CORD

QuestionAnswer
WHAT ARE THE FX OF THE SPINAL CORD? 1. HIGHWAY FOR SENSORY/MOTOR COMMAND TO/FROM BRAIN. 2. INTEGRATES & PROCESSES SENSORY 411 ON ITS OWN.
THE SPINAL CORD STARTS AT ____ ___ OF SKULL AND ENDS AT ___ VERTEBRA 1.FORAMEN MAGNUM.2. L1 (LUMBAR)
THE DORSAL (BACK/POSTERIOR) SURFACE OF SPINAL CORD HAS A SHALLOW LONGITUDINAL GOOVE OR ____ POSTERIOR MEDIAN SULCUS
THE ANTERIOR MEDIAN FISSURE IS A DEEP CREASE ALONG THE ___ SURFACE VENTRAL
EACH REGION OF THE SPINAL CORD ALONG THE CERVICAL,THROACIC,LUMBAR CONTAIN TRACTS OF THAT SEGMENT AND THOSE ___ TO IT. INFERIOR
SPINAL CORD TRACTS THAT BEGIN AT THE SACRAL REGION ARE THE ___ AND END ___ 1. NARROWEST 2. SACRAL REGION
WHERE ARE INTERNEURONS FOUND ON S.C.? SEGMENTS OF EXPANDED S.C. CALLED ENLARGEMENTS
WHAT IS THE FX OF INTERNEURONS IN S.C.? RELAY ARRIVING SENSORY 411 AND COORDINATING SOMATIC MOTOR NEURONS CONTROLLING LIMB MUSCLES
THE CERVICAL ENLARGEMENT SUPPLIES NERVES TO THE ___ ___ & UPPER ___ 1. PECTORAL GIRDLE 2. LIMBS
THE ___ ENLARGEMENT SUPPLIES NERVES TO PELVIS & LOWER LIMBS LUMBAR
WHERE DOES S.C. TAPER OFF TO FORM WHAT? INFERIOR TO LUMBAR ENLARGEMENT; TAPERS TO CONICAL TIP CALLED CONUS MEDULLARIS
WHAT EXTENDS FROM THE TIP OF THE CONIS MEDULLARIS ALONG THE LENGTH OF VERTEBRAL CANAL AS FAR AS S1 OR S2? FILUM TERMINALES
WHAT IS THE FX OF THE FIBROUS TISSUE OR FILUM TERMINALES? PROVIDE LONGITUDINAL SUPPORT AS PART OF COCCYGEAL LIGAMENT
HOW MANY SEGMENTS IS THE S.C.? 31
EVERY SPINAL SEGMENT HAS A PAIR OF ___ ___ GANGLIA. DORSAL ROOT (BACK/POSTERIOR)
WHERE ARE THE CELL BODIES OF SENSORY NEURONS ON S.C.? DORSAL ROOT GANGLIA (BACK/POSTERIOR)
WHERE ARE THE DORSAL ROOT GANGLIA LOCATED? LIES BETWEEN THE PEDICLES OF VERTEBRAL COLUMN
WHERE ARE THE DORSAL ROOTS? FOUND ON EITHER SIDE OF SPINAL CORD
WHAT ARE THE DORSAL ROOTS? THEY ARE THE AXONS OF THE SENSORY NEURONS OF DORSAL ROOT GANGLION.
ANTERIOR TO DORSAL ROOT,___ ___ LEAVES SPINAL CORD. VENTRAL ROOT
EVERY SPINAL SEGMENT HAS A PAIR OF ___ ___ GANGLIA. DORSAL ROOT (BACK/POSTERIOR)
WHERE ARE THE CELL BODIES OF SENSORY NEURONS ON S.C.? DORSAL ROOT GANGLIA (BACK/POSTERIOR)
WHERE ARE THE DORSAL ROOT GANGLIA LOCATED? LIES BETWEEN THE PEDICLES OF VERTEBRAL COLUMN
WHERE ARE THE DORSAL ROOTS? FOUND ON EITHER SIDE OF SPINAL CORD
WHAT ARE THE DORSAL ROOTS? THEY ARE THE AXONS OF THE SENSORY NEURONS OF DORSAL ROOT GANGLION.
ANTERIOR TO DORSAL ROOT,___ ___ LEAVES SPINAL CORD. VENTRAL ROOT
WHAT DO VENTRAL (FRONT/ANTERIOR) ROOTS CONTAIN? AXONS OF BOTH SOMATIC AND VISCERAL MOTOR NEURONS THAT CONTROL PERIPHERAL EFECTORS (MUSCLES OR GLANDS)
DORSAL (BACK) ROOTS ARE USUALLY ___ THAN VENTRAL (FRONT) ROOTS. THICKER
DORSAL/VENTRAL ROOTS ENTER AND LEAVE VERTEBRAL CANAL THROUGH ___ ___ INTERVETEBRAL FORAMINA
THE DORSAL ROOT GANGLION AND VENTRAL ROOT (FIBERS) COME TOGETHER TO FORM ONE SPINAL NERVE. T OR F TRUE
WHY ARE SPINAL NERVES CALLED MIXED NERVES? CONTAIN BOTH SENSORY(AFFERENT) AND MOTOR (EFFERENT) FIBERS
AFTER AGE 4 THE ___ __ CONTINUES TO GROW BUT THE __ __ DOES NOT. 1. VERTEBRAL COLUMN 2. SPINAL CORD
HOW DO THE DORSAL AND VENTRAL ROOTS ELONGATE after age 4 years old? the vertebral column keeps growing and carries dorsal root ganglion and spinal nerves farther away
By age 4 how is the growth of spinal cord aligned? segments of s.c. aligned with corresponding vertebrae
why is the cauda equina like that of a horse tail? the long extensions of the filum terminale and dorsal/ventral roots found caudally beyond the L2
what separates s.c. from external environment? vertebral column,surrounding ligaments,tendons,muscles
what protects the neural tissue from the bony vertebral canal? spinal meninges
Like CSF in the brain,what is the FX of the spinAL MENINGES? PROTECT,PHYSICAL STABILITY AND SHOCK ABSORBER
WHERE CAN YOU FIND SPINAL MENINGES? S.C. AND SPINAL NERVES
WHERE DO BLOOD VESSELS BRANCH TO SUPPLY O2 AND NUTRIENTS TO S.C. ? SPINAL MENINGES
WHAT ARE THE 3 LAYERS OF SPINAL MENINGES? 1. DURA MATER 2. ARACHNOID MATER 3. PIA MATER
AT THE FORAMEN MAGNUM,THE SPINAL MENINGES CONNECT WITH ___ ___ THAT SURROUNDS BRAIN. CRANIAL MENINGES
WHAT DOES THE OTER DURA MAER OF S.C. MADE OF? DENSE IRREGULAR C.T. AND OUTER/INNER SURFACE COVERED BY SIMPLE SQUAMOUS EPITHELIUM
THE EPUDURAL SPACE OF THE DURA MATER HAS _,_,_ areolar tissue,blood vessels, adipose tissue
WHICH LAYER OF SPINAL MENINGES BLENDS WITH FILUM TERMINALE TO FORM COCCYGEAL LIGAMENT? DURA MATER
THE INNER SURFACE OF THE DURA MATER IS IN CONTACT WITH OUTER SURFACE OF ___ __ ARACHNOID MATER
WHAT IS THE MIDDLE MENINGES OR ARACHNOID LAYER MADE UP OF? SIMPLE SQUAMOUS EPITHELIUM
WHAT SEPARATES THE ARACHNOID MATER FROM THE INNER MOST LAYER (PIA MATER)? SUBARACHNOID SPACE
WHAT DOES THE SUBARACHNOID SPACE CONTAIN? CSF
WHAT IS THE FX OF CSF IN SUBARACHNOID SPACE? ACTS AS SHOCK ABSORBER AND DIFFUSION MEDIUM FOR GASES,NUTRIENTS,WASTE,NEUROTRANSMITTERS
WHAT ARE THE BUNDLES OF FIBERS OF ARACHNOID MATER? ARACHNOID TRABECULAE
WHAT IS INTERWOVEN WITH ARACHNOID TRABECULAE? ELASTIC AND COLLAGEN FIBERS OF PIA MATER
WHERE ARE THE BLOOD VESSELS SUPPLYING S.C FOUND? PIA MATER
what connects the pia mater and spinal arachnoid mater to the dura mater? paired denticulate ligaments
what does the surface of the s.c. have to keep inner pia mater in place? thin layer of astrocytes and cytoplasmic extensionslock collagen fibers of pia mater
WHAT IS THE FX OF THE DENTICULATE LIGAMENTS? PREVENT SIDE TO SIDE MOVEMENT AND INFERIOR MOVEMENT OF S.C.
WHAT PREVENTS SUPERIOR MOVEMENT OF S.C.? THE FILUM TERMINALE BLENDING INTO COCCYGEAL LIGAMENT
THE CENTRAL,MASS OF GRAY MATTER OF SECTIONAL S.C. IS DOMINATED BY __ CELL BODIES OF NEURONS AND GLIAL CELLS
THE OUTER ___ MATTER OF S.C CONTAINS MYELINATED AND UNMYELINATED AXONS ORGANIZED IN TRACTS OR COLUMNS WHITE MATTER
Created by: mich826