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22 Cards in this Set
- Front
- Back
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layers of meninges around brain
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dura mater
arachnoid space pia mater |
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path of cerebrospinal fluid
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2 lateral ventricles
2 interventricular foramina third ventricle cerebral (mesencephalic) aqueduct fourth ventricle paired lateral apertures and single median aperture subarachnoid space central canal of spinal cord |
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CSF circulation
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inside to outside
absorbed trhough arachnoid villus into large dural venous sinuses (veins) and on to the internal jugular veins every 24 hours, 500 ml formed and absorbed tumors may obstruct flow and cause hydrocephalus |
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cranial bones
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frontal
parietals temporals occipital |
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Cerebrum
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R and L hemispheres:
seperated bylongitudinal fissure connected by corpus callosum convolutions in each hemisphere |
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Cerebral cortex
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w/ convolutions made up of gray matter
beneath cortex we see white matter hemispheres are dividd into lobes named afer cranial bones |
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insula
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5th part of cerebrum
lies deep under other lobes seen when spread lateral sulcus |
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funtional areas of cerebral cortex
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-primary MOTOR area of FRONTAL lobe in PRECENTRAL gyrus
primar SENSORY area of PARIETAL lobe in POSTCENTRAL gyrus |
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cerebellum
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in the back of the head
second largest part of brain separated from cerebral hemispheres by tentorium cerebelli 2 lateral cerebellar hemispheres and 1 medial vermis cortex of gray matter has folia (parallel gyri) |
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relational location of cerebellum
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inferior to midbrain
middle to pons superior to medulla |
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function of cerebellum
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coordination of fine, rapid muscular movement
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diencephalon
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seen when cerebrum and cerebellum are removed
thalamus epithalamus hypothalamus |
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thalamus
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contained in diencephalon
large, dumbell shaped: 2 lateral, ovoid masses connected by the intermediate mass w/ many nuclei that assume various roles |
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epithalamus
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small w/ habernular trigone nuclei
connection to pineal gland |
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hypothalamus
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connected to pituitary gland by infindibulum
ventral position of mammilary bodies (toward posterior) and tuber cinereum (near ase of infindibulum) |
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brain stem
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midbrain
pons medulla oblongata |
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midbrain
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w/ room that contains the corpora guadrigemina
superior colliculi which contain visual reflex centers inferior colliculi which contain auditory reflex centers superior cerebeller peduncles |
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pons
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connects spinal cord w/ parts of brain and each other
middle cerebellar peduncles |
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medulla oblongata
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caudally, is continuous w/ spinal cord
on it's venter are 2 roughly triangular structures called pyramids inferior cerebellar peduncles |
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reticular formation
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an area of dispersed gray matter w. some whie fibers
located in diencephalon, midbrain, pons, medulla, and spinal cord |
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function of reticular formation
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arousal system
essential for maintaining wakefulness injury here leads to coma |
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limbic system
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regions of gray matter in cerebrum and diencephalon
main components: olfactory bulbs, fornix, huppocampus, mammillary bodies of hypothalamus... visceral or emotional brain- pain, pleasue, anger, rage, fear, secual feelings, ect. |
