Week 4 Nervous System Flashcards
Nerve cells are made up of
Neurons with nuclei
Dendrites
Where neuron receives input from other cells
Axon
Sends out info to CNS or out to body
Axons are wrapped in
Schwann cells
Schwann cells
Myelin sheath covered lipid filled cells
Where does depolarization/ repolarization take place?
between the schwann cells on the axon
Terminal button
at the end of the schwann cells releases neurotransmitters to synapse cleft
What allows waves to jump quickly along axon?
Myelin
CNS glial cells
oligodentroctes
PNS glial cells
schwann cells
Grey matter
composed of nerve cell bodies because its not myelinated
White matter
composed of axons wrapped in myelin (myelin is white, fat)
Grey and white matter in brain
grey outside white inside
Grey and white matter in spinal cord
White outside, grey inside
Central canal
space in middle of spinal cord where cerebral spinal fluid can move, crucial for health of CNS
Cerebellum
bird brain, non voluntary movement
at the back of the head, below the temporal and occipital lobes and above the brainstem
relay station where info gets sent to cerebral cortex
Thalamus
control and regulation ANS
hypothalamus
Midbrain, pons, medulla oblongada
brain stem - control HR and resp rate and cranial nerves arise from it
Executive functioning, thinking, planning, problem solving, organizing, emotions, behavioral control, personality
frontal lobe
motor cortex
motor cortex
sensation
sensory cortex
memory, understanding, language
temporal lobe
perception, making sense of world, arithmetic, spelling
parietal lobe
