nervous system part 2
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nervous system part 2
how long is the spinal cord, and where does it go?
18 inches, from the occipital bone to second lumbar vertebrae
what is the spinal cord protected by?
vertebrae, meninges, and CSF
what is the pathway for sensory impulses traveling to brain and motor impulses traveling away from the brain?
what is the completely pathway. it goes from the nervous system from a stimuli to a response?
where does the sensory impulse enter the spinal cord at? it is composed of gray matter?
sensory impulse travels upwards towards the brain on what neurons?
afferent neurons in ascending tracts
motor impulse travels downard away from brain on what neurons?
efferent neurons in descending tracts
where does the motor impulse leave the spinal cord, it is composed of gray matter?
what is a rapid, simple automatic response that involves only a few neurons?
what kind of reflex passes through the spinal cord only?
spinal reflex (knee-jerk reflex)
spinal nerves attach to spinal cord by what two roots?
ventral root (motor)
dorsal root (sensory)
where do the spinal nerves leave the spinal cord?
through an opening in vertebrae
* interverbral forman
spinal nerves branch from spinal cord in anterior and posterior what?
what plexus supplies motor impulses to neck muscle and receive sensory impulses from neck and back of head?
what plexus includes the phrenic nerve?
what plexus supplies the nerve to shoulder, arm, forearm, wrist, hand?
what plexus includes the radial nerve?
what plexus is nerve supply to legs & pelvis?
what plexus includes the sciatic nerve?
what are the sensory neurons all over the body on skin (except face/scalp) and sens info through spinal cord to cNS on spinal nerves?
what is used to help identify which spinal nerve is involved in an injury (ex. herpes, sciatica)?
what is protected under 3 layers of membranes (meninges, CSF, bone)?
what four parts of the brain function together?
what is the name for three layers of connective tissue that cover the brain and spinal cord?
what meninges is the outermost layer attached to the skull?
what meninges is the middle layer which is between the dura matter and pia matter?
what meninges is the innermost layer, attached to brain and spinal corr, supplies blood, nutrients, and oxygen?
what is the clear liquid that circulates in and around the brain and spinal cord, it acts as a shock absorber?
cerebral spinal fluid (CSF)
what is four hollow cavities deep within the brain?
what is the canal that the 3rd and 4th ventricle connect?
2 ventricles in each hemisphere
what ventricle is continuous with the central canal and spinal cord?
what ventricle contains openings that allow the cfs to flow to areas around brain and spinal cord?
what is the name for pia matter lining each ventricle that provides vascular networking?
what produces by CSF and filters blood and release any additional secretions?
what is the largest, uppermost part of the brain?
what cortex is the outer layer of gray matter is the cerebrum?
what part of the cerebral cortex is made up of white matter than connects with other parts of the brain?
what part of the brain is responsible for voluntary movement, conscious thought, memory, reason, and abstract thinking?
the cerebrum is divided intro right/left hemispheres by what groove?
the longitudinal fissure
hemispheres are connected by white matter called?
what white matter allows impulses to pass from one side of the brain to another?
what is the word for elevations on the surface of the cerebral cortex?
what is the name for grooves between the gyri that are on the surface of the cerebral cortex?
the sulcus has two sulci what are they?
central, and lateral
what sulcus is between the frontal and parietal lobes that is positions at right angle to longitudinal fissure?
what sulcus curves alongside of each hemisphere separating temporal lobes from frontal and parietal lobes?
what is the four names of the visible lobes?
what hemisphere is anterior to central sulcus and superior to lateral sulcus?
what area in the frontal lobe provides conscious control of voluntary skeletal muscle?
primary motor area
what part of the frontal lobe is used for spoke/written communication?
motor speech area (broca's area)
if this lobe is damages it can cause motor aphasia?
what lobe is posterior to central sulcus, and superior to lateral sulcus?
what lobe has an area that receives/interprets nerve impulses coming from sensory receptors?
what lobe has the ability to estimate distance, size, and shape?
what lobe is inferior to lateral sulcus, and is the folding under hemisphere on each side?
what lobe participates in receiving/interpreting impulse from the ear?
what is the name of the area which provides conscious control over voluntary skeletal muscle?
primary central area
what area is used for spoken/written communication?
motor speech area
what are receives/interprets nerve impulses coming from sensory receptors?
primary sensory area
what area detects sounds from the environment, its in the temporal lobe?
auditory receiving area
what area interprets sound, its in the temporal lobe?
auditory association area
what area functions in speech comprehension, it is in the temporal lobe?
speech comprehension area
what area interprets smell from receptors in nose "olfaction" it is in the temporal lobe?
what lobe is posterior to parietal lobe, and extends over the cerebellum?
what lobe has visual receiving area & association area that interprets impulse that comes from retina of the eye?
what area is the visual receiving area & association area for interpreting impulse that comes from retina of eye?
what lobe exists but you cant see it from the outside?
what neuroglial cell is this?
what does this illustrate
c- cell body
3- action potention