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NervousSystem/KhadraMohamed (Senses (Receptors based on stimuli type…
NervousSystem/KhadraMohamed
Senses
Receptors based on stimuli region
Interoceptors
Located in internal organs/ special senses/ test and smell
Exteroceptors
Located in the skin, special senses/ ear, eye, eqolibriom
Proprioceptors
Located in Muscles including Tendons, ligaments and joints
Receptors based on stimuli type
Thermorecptor
Temperature receptor
Photoreceptor
Light receptor
chemoreceptors
chemical receptor
Nociceptor
Pain receptor
Mechanoreceptors
Baroreceptor
Blood pressure monitor
Mechanical receptor, touch, pressure
Eye Component and pathway
Component of eye
Fibrous layer
Sclera
helps to give shape to the eye
Cornea
Focus light in retina
vascular layer
choroid
nourishes the others layers, absorbs light- prevents scattring
inner layer
Retina
Rods
sensitveto light/ black and white
Cones
allaws to see color, best work in bright light
Regional specialization of the retina
Optic disc
macula lutea
f0vea centralis
Lens
Focuse light o the rtina
Iris
Sphinctor and dialts muscls, change size of pupil
visual pathway
corena
pupil
lens
posterior segment
retina
optic nerve
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Olfactory component and pathway
Located in nasal cavity and they are pseudostratfied epithelial cilited
pathway
olfactory receptors
olfactory sensory nerve within olfactory bulb
olfactory tract
Limbic system
primary olfactory cotex in temporal lobe
gustation component and pathway
component
taste buds
composed of epithelia cells
located in tongue, inner checks, posterior wall of pherynx
pathway
taste signals travels throuht 3 cranial nerves
modula oblogata
thatlamus
gustatory cortex
Ear component and hearing pathway
component
external
ouricle
middle ear
auditory ossicle
Tympanic membrain
boundry btween external and middle ear
inner ear
body labyrinth
cochlea
hearing pathway
vastebular nerve/ cochlea nerve
vastibulocochlea never
madula oblaogata
pans
thalamus
primary auditory cortex
Nervous System orgnzation
Central Nerve System
consist of Brain and spinal cord
works in recive, process in coming signals and respond
Peripheral Nerve System
consist of a cranial nerve and spinal nerve and it contain ganglia
works on being sensitive to stimuli and send the infromtions fowords the CNS
Types of motor fibers of the peripheral nervous system ( from CNS)
somatic motor
innervation to skeletal muscle
Visceral motor (autonomic)
innervation to smooth muscle, cardaic muscle and glands
types of sensory fibers of the peripheral nervous system ( to CNS)
somatic sensory
touch, pain, from body walls and limbs
visceral sensory
strech, pain, from internal body
Anatomy of nervous system
Structure of a nerve
Epineurium/ raps a groups of fascicles
Prineurium/ raps a fascicle which contine a group of axons
endoneurium/ raps axon
Glial cels
CNS
Astrocytes
Support neurons/ help maintain the appropriate chemical environment
Microglial Cells
Immune cell/ phagocytes CNS
Ependymal Cells
simple cuboidal/ culomonar/ lining space filld with cerebrospinal brain and spinal cord
Oligodendrocytes
raps azons with their plasma membran/ insulation and increases signal sped
PNS
satellite cells
support neuron cells and regulate material in and out of cell
Schwann cells
rap their plasma membrain around one axon
Neurons
Major component of Neurons
cell body
chromatophilic substance
nucleus and nucleolus
processes
dendrites
recive
axon
send
axon collaterals
terminal aborizations
terminal boutons
Structural types of neurons
Multipolar
many processes
Bipolar
two processes
Unipolar
one process
Functional types of neurons
Sensory neurons
afferent neurons
Motor neurons
efferent neurons
Interneurons
between motor and sensory neurons