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Ch 13 & 14
Spinal Cord & Cranial/Spinal Nerves
40
Anatomy
Undergraduate 1
04/18/2011

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Cards

Term
Vertebrae
Definition
made up of discs
purpose of Stability and Movement
Term
Epidural Space
Definition
filled with FAT
for cushion
Term
Dura Mater
Definition
outer meniges
"Tough Mother"
dense irregular CT tube
Term
Subdural Space
Definition
filled with Interstitial Fluid
also know as Extracellular fluid
Term
Arachnoid
Definition
spider web of COLLAGEN fibers
Term
Subarachnoid Space
Definition
CSF: cerebral spinal fluid
Term
Pia Mater
Definition
inner meniges
"Soft Mother"
right on the cord
thin layer covers BV
Term
Meniges
Definition
Dura Mater
Arachnoid
Pia Mater
Term
Dura Mater Extensions
Definition
Falx Cerebri
Tentorium Cerebelli
Falx Cerebelli
Term
Falx Cerebri
Definition
seperates -- fold of the dura mater going down deep into the fissure (crevice) of the two cerebral hemispheres
Term
Tentorium Cerebelli
Definition
Seperates the cerebrum from the cerebelli
Term
Falx Cerebelli
Definition
Seperates the two cerebellum hemispheres
Term
Functions of Tracts
Definition
highway for sensory and motor information
SEnsory tracts AScend (AS SE)
MOtor tracts DEscend (MO DE)
>> ASSE MODE
Term
Naming of Tracts
Definition
indicates POSITION and DIRECTION of signal
Term
Connective Tissue Coverings
Definition
Endoneurium (innermost)
Perineurium
Epinerium (outermost)
Term
Endoneurium
(CT Covering)
Definition
innermost covering -
wrapping around each nerve fibers
Term
Perineurium
(CT Covering)
Definition
Surrounds group of nerve fibers forming a fascicle
Term
Epineurium
(CT Covering)
Definition
outermost-
Covering of entire nerve
-- dura mater blends into it at intervertebral foramen
Term
Location of MOTOR TRACTS
Definition
-pyramidal tract (corticospinal)> information directly from brain

-extrapyramidal tract > indirect; makes "stops" on the way to the brain
Term
Location of SENORY TRACTS
Definition
-spinothalamic
-spinocerebellar
-posterior column
Term
Spinothalamic tract function
Definition
pain, temperature, deep pressure & crude touch
Term
Posterior columns function
Definition
proprioception, discriminative touch, two-point discrimination, pressure and vibration
Term
Direct pathways (corticospinal & corticobulbar) Functions
Definition
– precise, voluntary movements
Term
Indirect pathways (rubrospinal, vestibulospinal) Functions
Definition
programming automatic movements, posture & muscle tone, equilibrium & coordination of visual reflexes
Term
Thalamus
Definition
Relay station for sensory information on way to cortex
Term
Hypothalamus
Definition
-Controls and integrates ACTIVITIES OF THE ANS which regulates smooth, cardiac muscle and glands
-Synthesizes regulatory HORMONES that control THE ANTERIOR PITUITARY
-Contains CELL BODIES OF AXONS that end in posterior pituitary where they secrete hormones
-Regulates rage, aggression, pain, pleasure & arousal EMOTIONS
-FEEDING, THIRST & SATIETY centers
-Controls body TEMPERATURE
-Regulates daily patterns of SLEEP
Term
Cerebrum
Definition
Term
Diencephalon
Definition
thalamus & hypothalamus
Term
Cerebellum
Definition
Function
– correct voluntary muscle contraction and posture based on sensory data from body
about actual movements
– sense of equilibrium
Term
Brainstem
Definition
medulla-
pons-
midbrain-
Term
mechanical protection brain - CSF
Definition
cerebral spinal fluid -
floats brain & softens impact with bony walls
Term
chemical protection of brain - CSF
Definition
optimal ionic concentrations for action potentials
-circulation
Term
4 Important SOMATIC SPINAL REFLEXES
Definition
stretch
tendon
flexor(withdrawal)
crossed extensor reflexes
Term
somatic reflexes result in ...
Definition
...skeletal muscle contraction
Term
Choroid plexus
Definition
capillaries covered by ependymal cells
Term
Choroid plexus Ventricles
Definition
4 ventricles:
2 lateral ventricles, one within each cerebral hemisphere
roof of 3rd ventricle
fourth ventricle
Term
5 cranial nerves arise from medulla
Definition
8 thru 12 - in the medulla oblongata
Term
Cranial Nerve V
Definition
Skin on face supplied by Cranial Nerve V
Term
propioception
Definition
ability to know where body parts are
Term
Blood-brain barrier (BBB)
Definition
– protects cells from some toxins and pathogens
• proteins & antibiotics can not pass but alcohol & anesthetics do
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