CH. 15 NERVES Flashcards
Meninges
(outer to inner most layer)
- Dura mater
- Arachnoid mater
- Pia mater
Dura mater
- outer layer, fibrous layer
Arachnoid mater
-Middle, two layered, fibrous and elastic membrane that covers folds and fissures of brain.
Subarachnoid space
- between arachnoid and Pia mater where CSF circulates
Pia mater
contains small vessels that supply blood to brain. (inner layer)
Falx Cerebri
fold of dura mater that separates the 2 cerebral hemispheres
tentorium cerebri
supports temporal and occipital lobes and separates the cerebral hemispheres from cerebellum
CSF
- colorless, odorless fluid made in choroid plexus
- provides cushion, maintain norma; intracranial pressure, provide nutrition and remove metabolic waste
Cerebrum
largest part of the brain and is composed of 2 hemispheres
Frontal lobe
-Control intellectual function awareness of self, personality and autonomic responses.
- Left lobe: Broca’s Area; formulation of words
- primary motor cortex that are responsible for functions related to voluntary motor activity
EX. right side nerve controls left side body
Parietal lobe
- Primary somesthetic (sensory) cortex
- receives sensory input such as position sense, touch, shape and texture of objects.
EX. cross at medulla where left side nerves control right side body.
right nerves control left side body
Temporal lobe
- primary auditory cortex
- Weirnickes area, located on left temporal lobe, responsible for comprehension of spoken and written language.
- Auditory, visual and somatic sensory input.
Occipital lobe
primary visual cortex
Dicenphalon
Composed of thalamus, hypothalamus, epithalamus and subthalamus
Thalamus
integration station of spinal cord
Hypothalamus
- maintains homeostasis
- regualtion of body temp, hunger, thirst
- formation of ANS responses and storage and secretions of hormones from pit gland.