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Halima.Abdi.Central Nervous System (Cerebrum (Lobes (Frontal (Plans,…
Halima.Abdi.Central Nervous System
Brain stem
Pons
Bridge between the cerebellum and brain stem
medulla oblongata
Reticular formation of nuclei; controls blood pressure & respiratory center
Midbrain
Most superior part of brain
Cerebrum
Lobes
Frontal
Plans, initiates, and voluntary movement
Parietal
Processes sensory stimuli
Occipital
Visual processing center
Temporal
Recognizes objects, words, and faces.
Gyri
Post-central gyri
Receives information form primarily skin, muscle and joints.
Pre-central gyri
Pyramidal neuron synapses with motor neurons for voluntary movememt
Three tracts
Commissural Tract
Takes information from one hemisphere to another
Projection Tract
Ascending and descending fibers (axons)
Association Tract
Connects parts of the cortex of the same hemisphere
Broca area
Controls motor movements necessary for speaking
Wernicke area
Regions that function in speech comprehension
Diencephalon
hypothalamus
the main visceral control center of the body, regulation of hunger and thirst
epithalamus
Has a nucleus; secretes Melatonin
thalamus
all conscious sensory signals: sends axons to the cerebral cortex
Cerebellum
the function of the cerebellum
Coordinates body movements and maintains posture
the three cerebellar peduncles
Middle cerebellar penduncles
Connects pons to cerebellum
Superior cerebellar peduncles
Connects cerebellum to midbrain
Inferior cerebellar peduncles
Carries primarily afferent fibers
CNS protection
the epidural space
In spinal cord filled with fat
the subarachnoid space
Space and blood vessels filled with cerebrospinal fluid
the three meninges
Dura Mater
Tough, dense fibroses
Arachnoid Mater
Projects into the sinuses formed by the dura mater
Pia Mater
Very thin, very vascular mater
dural sinuses
Blood filled with space (oxygen pour blood)
Spinal cord
conus medularis
Connective tissue that connects to coccyx
cauda equina
Sends and receives messages from lower limbs
filum terninale
Stabilizes spinal cord
anterior root
efferent motor
posterior root
Afferent sensory/ transmits sensory information