Lecture 5 Flashcards
(23 cards)
Commonalities
There is a primary sensroy cortex
All have maps (laid out in a specific way)
Primay sensory cortices secondary, have hiarchy
Sound
Vibration,
Travel through pressure waves
Frequency, high low pressure
Outer ear
Captures sound waves
Pinna
Amplifies certain frequences of sound infront
Deminishes sound from behindu s
Middle ear
Recivies virbations of ear drum
3 ossicles: malleus incus and stapes
Oval window - where bones transfer enegery to
Inner ear
Cocheal
Basilar membrane- exposed to fluid waves trigged by oval window
Basial high apical low frequnces
Tonotopic map
Transduction of sound
Closing and opening of CA channels.
Organ or corti
Outer hair cells - logged into membranes, cells movement and lenthing causes an amplifation of the sound
Tonotopic map
Charateristic frequences- inner hair cells respond to characteris frequnces, neighbors cells respond to similar frequency
Complex sounds ar eborken down to their component frequencies
Labeled line coding
Each neuron has one speciifc type of sensory information
Somatosensory system
Ability to detect snesory infomraiton from the body
Touch
Mechanoreceptors - pressure vibration
Thermorecpetors tempeature change
Recpetive field
Area of skin that actives a sensory receptor
Congential analgesia
Inability to feel pain
Chronic pain
Acute pain adaptive. Not chronic pain
Nociceptors
Mechanical - physical dmg caused by pressure
Thermal heat or col
Chemical toxic
Polymodal combinatioons of harmful stimuli
Proprioception
Allow us to sense where our body parts are moveing etc
Muscle spindles limit streching of muscles
Golgi tendon organs limit muscle contraction
Somatosensory pathway
Face - trigeminal pathway
Body - spinal cord
Dermatomes - body organization
Chemical sesnse
Taste and smell
Fustatory pathways oflaction pathway
relies on taste recprds on the tongue
Smell
Tastants
Chimeicals that can depolarize taste cells
Smell
scents introduced in the Olfactory epithelium
Anosognosia
Lack awareness of their own pphysiacl impairments
