Learning Objectives 11: Nervous System Flashcards
Describe the levels of organization of the nervous system
Central vs. Peripheral
central=brain and spinal cord
peripheral=everything outside CNS-cranial and spinal nerves
Afferents vs. Efferents
afferent=information coming from periphery and moving toward CNS
efferent=carrying motor information away from central nervous system
Somatic vs. Visceral
somatic=skin/body; things responding to external environment
visceral=internal organs; internal environment
What is the autonomic nervous system? What are the two divisions of the autonomic nervous system?
the combination of sympathetic and parasympathetic nervous systems
sympathetic-fight or flight
parasympathetic-rest and digest
What are dendrites? What are axons?
dendrites=the part of a neuron that collects electrical signals and sends it to the cell body
axons=the long trunk that sends nerve impulses away from the cell body to other neurons
What is the difference between neurons and neuroglial cells?
neurons=nerve cells that conduct electrical impulses
neuroglial cells=neuron support cells with multiple purposes; protecting from disease, helping speed up electrical impulses, getting rid of debris
What is gray matter mostly composed of? What is white matter mostly composed of?
gray matter is mostly cell bodies of neurons
white matter is mostly the myelinated axons of neurons
How is the organization of gray and white matter different in the brain and spinal cord?
in the brain white matter is mostly the center and grey matter mostly line the outside of the brain
in the spinal cord it is the opposite, the outer layer (cortex) is the grey matter and the inside is the white matter
Give the general functions of each of the 8 structures of the brain
cerebrum=higher order processing
corpus callosum=connects cerebral hemisphere and facilitates communication
cerebellum=coordination and voluntary movement
thalamus=relay station for senses-decided where sensory information goes to in the brain
hypothalamus=controls release of hormones from pituitary gland and temperature regulation
midbrain=processing visual and auditory information
pons=relays sensory information from brainstem to cerebellum and thalamus
medulla oblongata=maintain vital body functions etc-breathing
What structures make up the brainstem?
the midbrain, pons, and medulla oblongata
Identify and give the general function of each of the 4 lobes of the cerebrum.
frontal lobe=higher order mental and cognitive functioning, personality, voluntary motor, regulation of emotion and behavior
parietal=somatic sensory processing
temporal lobe=auditory processing
occipital lobe=visual processing
What is Broca’s area? What lobe of the brain is it located in? What type of information does it process?
The area of the brain located on the left frontal lobe that processes speech production
What is Wernicke’s area? What lobe of the brain is it located in? What type of information does it process?
An area of the brain located on the left temporal lobe that is involved with speech comprehension
What is the difference between expressive and receptive aphasia?
expressive=issues with producing speech, damage to broca’s area (left frontal lobe)
receptive=issues with comprehending speech and creating responses, damage to wernicke’s area (located on left Temporal lobe)
What are the meninges? What three layers make up the meninges? What is their function?
connective tissue covering brain and spinal cord (CNS) that are for protection
layers
outermost=duramater
middle layer=arachnoid
inner layer= PIA mater
What is within the subarachnoid space?
filled with cerebrospinal fluid that protects and nourishes the brain
Where do arachnoid granulations extend into?
into the venous sinus