neuroscience quiz

the five regions of the spine are called

cervical ( 8 nerves 7 vertebrae) , thoracic (12 nerves), lumbar ( 5 nerves), sacral ( 5 nerves), coccygeal ( 1 nerve 4 vertebrae)

dermatome

the area of skin innervated by a single nerve root

a nerve root is

axon of motor and sensory neurons which are combined into spinal nerves in the PNS

cauda equina is

a rare, medical emergency caused by severe compression of nerve roots at the base of the spine

Where are cell bodies for sensory spinal neurons located?

dorsal root ganglia - outside of the actual spinal cord

Where are cell bodies for motor spinal neurons located?

WITHIN the spinal cord (and brainstem, for cranial nerves)

reflexes are

Subconscious automatic stimulus - response mechanisms ( found in humans)

four examples of reflexes are

patellar tendon reflex, grasp reflex, corneal reflex, and plantar response

ANS’s function is to ..

innervate involuntary structures (smooth muscle, glands, etc..)

The major two divisions of ANS are

sympathetic ( flight and fight) and parasympathetic (calming)

the three meningeal layers are

arachnoid mater, dura mater, and pia mater

falx cerebri is

sagittal and is between the cerebral hemispheres

Tentorium cerebelli is found

between the cerebrum and cerebellum

subdural’s upper and lower boundaries are

arachnoid and dura mater

epidural’s lower and upper boundaries are

dura mater and skull or vertebrae

subarachnoid upper and lower boundaries are

brain; foramen magnum to second sacral vertebrae

The four ventricles of the brain are

two lateral ventricles, third ventricle, fourth ventricle

CFS (cerebral spinal fluid) is

Circulates around the brain, through the ventricles and through the subarachnoid space.

The circle of willis is

found on the base of the cerebrum connecting the internal carotid and vertebral arteries