Card Set Information
What is perception?
Compare information and infer the meaning of what had just been sensed.
What is Sensory integration?
compare what comes in with what is already there.
What is proprioception?
internal monitoring of body and limb positions.
What is adaptation?
Diminished responsiveness to non-changing stimulation.
Why is adaptation important?
Allows for an update of information when a new signal comes in.
What is kinethesis
the continuous monitoring of movements.
What is information channeling?
Each sensory receptor has a specialized channel for that sense.
What is the retina?
Detects and processes information, it is the primary sensory receptor for sight.
How is the eye similar to the camera?
It sees the image inverted and reduced in size.
What are image focusing units?
Cornea, lens, pupil, iris
What is accommodation?
change in lens and pupil to focus
What is myopia?
Near sightedness. lens too fat
What is hyperopia?
Far sightedness. Lens to thin.
What are cones?
they are photoreceptor cells that respond to color.
What are rods?
they are photorecpetor cells that respond to brightness.
What is the macula lutea?
area in the retina with the highest image resolution. It contains many cones.
What is the fovea?
A depression in the macula full of only cones.
What is macular degeneration?
A disease that loses cones causing a black spot in the middle of the eye.
What is retinitis pigmentosa?
A genetic disease that loses rods. Causing loss of peripheral vision.
what is presbyopia?
loss of vision.
What is the part of the retina that reflects light?
What do bipolar cells in the eye do?
they carry on the graded potential from the cone or rod to the ganglion cell.
What do ganglion cells do?
they take the graded potential and create an action potential.
What do amacrine and horizontal cells do?
they are inhibitory cells that restricts the spread of signals.
What is the visual field?
region of the visual world that is seen by the eyes.
What is the receptive field?
region of visual world that stimulates a receptor cell or neuron.
Does the nasal or temporal side of vision dessucate?
What colors do cones see?
red, blue, green
Where does decussation in vision occur?
the optic chiasm
Where is the lateral geniculate nuclei (LGN) located?
What is the magno cellular division of the lgn for? How many layers does it have?
movement and location. 2
What is the parvocellular division of the lgn for? How many layers does it have?
details and color. 4
What is the superior colliculi used for in vision?
Usually from rods used to orient the body spatially , detects movement.
What is the suprachiasmatic nuclei (SCN) used for in vision?
uses light for internal rhythms.
What is the extraocular muscle/ motor nerve nuclei used for?
What layers of the lgn does nasal path go to?
What layers of the lgn does the temporal path go through?
What does the visual cortex do?
processes color, shape, motion information received from retina via thalamic nuclei relays
How many layers the the visual cortex have? How is it set up?
It has 6 layers running horizontal. It has many vertical columns going through the layers.