Class notes
Vestibular Senses in Relation to the Brain
- Course
- NEU 101 (NEU101)
- Institution
- Arizona State University
Unit 4 lecture 1 NEU 101, goes over all somatosensations, including how they get to the brain.
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SomatosensationVestibular sense
semicircular canals in the ear
gives us sense of head position and gravity
Makes balance
3 canals 90 degrees from another (all 3 plains)
detect motion (spinning
Problems
Gives us the spins
creates naseu
Semicircular canal
All canals filled w endolymph
All have a bump at the bottom called the ampulla
Cupula: gelatinous mass insinde ampulla
inside is where the hair cells are
Hair cells
inside the cupulla
function similarly to auditiory receptive hair cells
flow with endolymph
towards bigger = open channals and potassium flows in
towards smaller = close canals and no potasssium in
Proprioception
The awareness of your bodys positions
Somatosensation 1
, By getting signals
muscle Spindle Afferents (if they are stretched or relaxed)
sensory nerve fibers wrapped around muscle fibers that are solely to
detect stretch or contraction
Golgi Tendon Organs (Tendon that connects muscle to bone)( more signa;
= more stretched)
Sensory fibers embedded in intersections of muscle & tendon
Senses force being aplied to the muscle
Joint receptors (let us know if joints are bent or stretched)
Receptors embedded within joints
( holds in wrestling use these reflexes to cause pain and get the person
to tap out)
sense angle of the joint
Kinesthesis
Kinesthesis = sense of motions
Combination of proprioception, vision, vestibular sense
Is an almost & maybe ( because it is just a mix)
Somatosensation
Skin
Heaviest organ
Outer layer of dead cells = epidermis
Next layer = Dermis
Contains receptor cells that transduce mechanical movement of skin touch
into neural signal
Adaption rates
Somatosensation 2
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