Ch 8 Cns System

Front 1

Central Nervous System (CNS)

Back 1

brain and spinal cord

Front 2

Brain

Back 2

portion of the central nervous system contained within the cranium

Front 3

cerebrum

Back 3

largest portion of the brain; divided into right and left halves, known as the cerebral hemispheres, which are connected by a bridge of nerve fibers called the corpus callosum; lobes of the cerebrum are named after the skull bones they underlie

Front 4

frontal lobe

Back 4

anterior section of each cerebral hemisphere; responsible for voluntary muscle movement and personality

Front 5

parietal lobe

Back 5

portion posterior to the frontal lobe; responsible for sensations such as pain, temperature, and touch

Front 6

temporal lobe

Back 6

portion that lies below the frontal lobe; responsible for hearing, taste, and smell

Front 7

occipital lobe

Back 7

portion posterior to the parietal and temporal lobes; responsible for vision

Front 8

cerebral cortex

Back 8

outer layer of the cerebrum consisting of grey matter; responsible for higher mental functions (cortex = bark)

Front 9

thalamus, diencephalon

Back 9

each of two grey matter nuclei deep within the brain; responsible for relaying sensory information to the cortex

Front 10

gyri

Back 10

convolutions (mounds) of the cerebral hemispheres

Front 11

sulci

Back 11

shallow grooves that separate gyri

Front 12

fissures

Back 12

deep grooves in the brain

Front 13

cerebellum

Back 13

portion of the brain located below the occipital lobes of the cerebrum; responsible for control and coordination of skeletal muscles

Front 14

brainstem

Back 14

region of the brain that serves as a relay between the cerebrum, cerebellum, and spinal cord; responsible for breathing, heart rate, and body temperature; the three levels are the mesencephalon (midbrain), pons, and medulla oblongata

Front 15

ventricles

Back 15

series of interconnected cavities within the cerebral hemispheres and brainstem filled with cerebrospinal fluid

Front 16

Cerebrospinal Fluid (CSF)

Back 16

plasma-like clear fluid circulating in and around the brain and spinal cord

Front 17

spinal cord

Back 17

column of nervous tissue from the brainstem through the vertebrae; responsible for nerve conduction to and from the brain and the body

Front 18

meninges

Back 18

three membranes that cover the brain and spinal cord, consisting of the dura, pia and arachnoid mater.