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LeonardCrainNervousSystem (Senses (Sensory receptor based on the type of…
LeonardCrainNervousSystem
Senses
receptors based on stimulus origin
exteroreceptors
cutaneous receptors
interoceptors
proprioceptors
Sensory receptor based on the type of stimulus
Thermoceptor
Photoreceptor
Chemoreceptor
Nociceptor
Methanoreceptor
Baroreceptor
eye components and visual pathway
Cornea (Focus) - Pupil - Lens (focus) -retina
olfaction components and pathway,
Olfactory receptor - Olfactory sensory neuron - within the olfactory bulb - olfactory tract - Limbiz system (Emotional brain & memories) and Primary olfactory cortex in temporal lobe
gustation components and pathway
Medulla oblongata - Thalamus - gustatory cortex in the insula
ear components and pathway
Cochlea of CN 8 - medulla oblongata - pons - midbrain - thalamus - primary auditory cortex (in temporal lobe)
Nervous System organization
C.N.S
Structure - Brain & Spinal Cord
Function - receives, process information
P.N.S
Structure Cranial Nerves
attached to brain
Structures - spinal nerves
to spinal cord
Ganglia - here neurons are clustered
Somatic Division
Motor - Voluntary system
sensory - From ventral body cavity contents
Autonomic division
Visceral sensory - from ventral body cavity contents
Autonomic (Visceral) motor - Mainly to contents of uertral body cavity
anatomy of nervous system
nerve components
Axon - part of neuron that carries signal
Myelin sheath - insulation that covers some Axon
Perineurium - Fibrous C,T surround each fasicles
Bundle of Fascicles - Nerve
Epineurium - tough, fibrous C.T surrounds nerve
Glial Cell
surrounds the neurons - out number neurons roughly 10 to 1 - divide throughout life of the cell
neurons
Major components
Cell body
Nucleus and nucleolus
Chromatophilic substance
dendrites
Axon Hillock
Axon
Axon collateralis
Terminal Boutons
Terminal arborization
Structural Groups
Multipolar - several dendrites - makes it multipolar
Bipolar - two processes from the cell body
Unipolar (pseudo unipolar)
Functional Group
Motor - or efferent neurons
Sensory - or afferent neurons
Interneurons - or association neurons