Sensory and Motor Systems Flashcards
Adaptation
filtering stimuli to concentrate on the new stimuli
Intensity
action potential frequency
Somatic sensation
feeling from the body
Transduction
the transformation of pressure, stretch, or vibration into a sensory signal
Nociceptors
free nerve endings that transport pain stimuli to the CNS
Neurites
undifferentiated fiber off the cell
Homunculus (somatotopic map)
-neural representation of the surface of the body
-size is proportional to the sensitivity of the region
Outer ear
-pinna
-eardrum
Middle ear
-malleus
-incus
-stapes
-oval window
Inner ear
-cochlea
-vestibular apparatus
Pinna
flaps of skin and cartilage that focus sound waves
Eardrum (tympanic membrane)
separates the outer ear from the middle ear
Oval window
membrane that separates the air-filled middle ear and the fluid-filled inner ear
Scala media (cochlear duct)
fluid-filled chamber in the middle of the cochlea
Nasal hemiretina
-the half of the retina closest to the nose
-sees the lateral field of view
-decussates
Temporal hemiretina
-the half of the retina closest to the temples
-sees the medial field of view
-does not decussate
Optic tract
-where optic nerve fibers separate into the temporal and nasal projections
Ischemia
loss of blood flow
Infarct
tissue damage
Hypoxia
inadequate oxygen due to a blockage
Anoxia
absence of oxygen due to a rupture
