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INTRO: NERVOUS SYSTEM (LO's: (List different parts of the nervous…
INTRO: NERVOUS SYSTEM
LO's:
List different parts of the nervous system.
Classify according to morphology, direction of flow of impulses and physiology.
Describe the general function
Explain the functional unit of the NS
Explain the functional unit of the NS
List different cell types.
Brain anatomy
Telencephalon
(Large main bit)
Corpus
(surrounding central part)
Diencephalon
Central part
Mesencephalon
(Below centre)
Cerebellum
Hind-brain
Pituitory
Nerves of the PNS
Cranial
Spinal
Ganglia
MIXED
Morphological division:
Central nervous system
Peripheral nervous system
Matter
Grey
Cell bodies
White
Physiological division:
Somatic
Co-ordinates voluntary activities such as movement and reflexes
Visceral
Responsible for involuntary activity such as cardiac function and digestion
The neuron
Parts:
Dendrites
To the cell
Axons
From the cell
Only one
Soma (cell body)
Types:
Pseudounipolar neuron
Axon and dendrites not separated by cell body
Cell in dorsal root ganglian
Bipolar neuron
Dendrites arborizes in the periphery
Multipolar neuron
Multiple dendrites
Afferent system
Transmit impulses towards spinal cord and brain
Efferent system
Transmit impulses away from the brain and spinal cord
Neuronal processes:
Nerve fibres