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Lecture 17
Brain II
17
Anatomy
Undergraduate 2
10/25/2010

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Cards

Term
brain stem
Definition
-medulla, pons, midbrain
Term
medulla
Definition
-location foramen magnum
-cardiovascular/respiratory centers
-motor/sensory decussation
Term
pons
Definition
-superior to medulla
-part of respiratory center
Term
midbrain
Definition
-superior to pons
-auditory/visual reflex centers
Term
diencephalon
Definition
-thalmus and hypothalmus
Term
thalamus
Definition
-superior to midbrain, inferior to corpus callosum
-relay center for all sensations except smell
Term
hypothalamus
Definition
-nuclei control sleep/wake cycle and eating
-controls autonomic NS
-connections with pituitary gland
Term
Reticular Activating System (RAS)
Definition
-column of neurons in brain stem from thalamus to medulla
-maintain conscious state (coma when injured)
Term
cerebellum
Definition
coordinates movement
Term
basal ganglia
Definition
initiates movement in an adult
controls movements in newborns
Term
substantia nigra
Definition
involved in gross movements
( Parkinson's when damaged)
Term
limbic system
Definition
-formed by many parts of the brain
-sex drive and major memory center
Term
Fasciculus gracilis and cuneatus
Definition
-sensory pathway
-origin-spinal cord
-decussation-medulla
-destination-area 3,1,2
-synapse in thalamus
Term
corticospinal tract
Definition
motor pathway
-origin-area 4
-decussation-medulla
-destination-spinal cord
Term
drainage of CSF
Definition
-lateral ventricle
-third ventricle
-cerebral aqueduct
-fourth ventricle
-subarachnoid space
Term
poliomyelitis (lower motor neuron lesion)symptoms
Definition
-flaccid paralysis
-reflex absent
-muscle atrophy
Term
cerebrovascular accident (CVA or stroke or upper motor neuron lesion) symptoms
Definition
-spastic paralysis
-relxes intact
-Babinski response
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