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3. Basics of neurophysiology. Autonomic nervous system.
Terms in this set (26)
Brain and the spinal cord
CNS consists of?
Nerves and ganglia
PNS consists of?
1. Somatomotor/efferent nerves
2. Somatosensory/afferent nerves
3. Mixed nerves
Type of nerves that we have in the somatic nervous system?
Nerves from CNS towards skeletal muscle (voluntary movements)
Nerves from skin and mucosa towards CNS (conscious sensation)
Vegetative nervous system
Another name for the autonomic nervous system?
1. Visceral afferents
2. Visceral efferents
Type of nerves of the autonomic nervous system?
From internal organs towards CNS (partially conscious detection, e.g. visceral pain)
Innervates smooth muscles, glands, heart, internal organs responsible for the body functions which are not under conscious control
- enteric nervous system
connection between stimulus intensity and sense intensity
Shows that: the subjective sensation elicited by a certain stimulus is proportional to the logarithm of ratio of the stimulus intensityand treshold of perception
calculation of difference threshold (Δφ, just noticeable difference, JND) → the just noticeable difference of stimulus intensity
signal converter, converts the different physical energies to neural activity
range between threshold and maximal stimulus
to 1 receptor belonging sensory area
decrese of response to a constant stimulus
effect of a too long or too frequent stimulation
1. in the receptrors → amplitude code (amplitude of receptor potential)
2. in synapse → amount of neurotransmitter
3. in the afferent nerve endings → frequency code (frequency of AP)
sense organs, mucosa, skin
muscles, tendons, inner organs
Deep somatosensory receptors?
primary (axon terminal of the cell is the sensor) → eg. olfactory cell
secondary → afferent nerve endings conduct from the cells
Specific sensory cells (histology)?
axon of the receptor conducts the stimulus to centrum
o free → no capsule
sensory (afferent) nerve endings?
high differenced receptors with complicated structure?
1. fast adapting, dynamic (phasic) receptors
2. slow adapting, static (tonic) receptors
Adaption receptors can be...?
- sense the change of stimuli
- response (receptor potential and firing rate) is proportional with velocity of change of stimulus (the intensity of response decreases in cases of constant stimulus intensity)
fast adapting, dynamic (phasic) receptors?
- no capsule
- sense constant stimuli also
- receptor potential and firing rate is proportional with stimulus intensity
slow adapting, static (tonic) receptors?
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