Anatomy of the Eye
Iris
a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.
Ear canal
The innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs
touch
The sense of touch is really a collection of several senses, encompassing pressure, pain, cold, and warmth.
Anatomy of the Eye Cont.
Optic disc
The nerve that carries neural impulses from the eye to the brain.
Gestalt
An organized whole. Just thought psychologists emphasize our tendency to integrate pieces of information into meaningful wholes.
Lens
the transparent structure behind the pupil that changes shape to help Focus images on the retina.
Eardrum
The chamber between the eardrum and the cochlea containing three tiny bones that concentrate the vibrations of the eardrum on the cochlea's oval window
smell
the faculty or power of perceiving odors or scents by means of the organs in the nose.
Torsten Wiesel
Along with David Hubel discovered feature detector groups of neurons in the visual cortex that respond to different types of visual images
Depth perception
the ability to see objects in three dimensions although the images that strike the retina are two dimensional, allows us to judge distance.
Pupil
The adjustable opening in the center of the eye through which light enters.
Semicircular canals
three tiny, fluid-filled tubes in your inner ear that help you keep your balance
Anatomy of the Ear Cont.
Vestibular nerve
sends balance and head position information from the inner ear to the brain.
Ernst Weber
just-noticeable-difference (JND) that eventually becomes his law; Studies: 1st study on JND
Top-down processing
Information processing Guided by higher-level mental processes, as when we construct perceptions drawing on our experiences and expectations.
Cornea
The eyes clear, protective outer layer, covering the pupil and Iris.
Cochlea
A cold, bony, fluid-filled tube in the inner ear, sound waves traveling through the cochlear fluid trigger nerve impulses
taste
the sensation of flavor perceived in the mouth and throat on contact with a substance.
David Hubel
United States neuroscientist noted for his studies of the neural basis of vision (born in 1926)
Bottom-up processing
Analysis that begins with the sensory receptors and works up to the brains integration of sensory information.
Retina
The light sensitive inner surface of the eye, containing the receptor rods and cones + layers of the neurons that begin the processing of visual information.
Auditory nerve
Carries the neural messages to your Thalamus and then on to the auditory cortex in your brains temporal lobe
pain
physical suffering or discomfort caused by illness or injury.
Gustav Fechner
stated that the magnitude of a sensory experience is proportionate to the # of JND's that the stimulus causing the experiences above the absolute threshold
Anatomy of the Eye Cont.
Optic nerve
The nerve that carries neural impulses from the eye to the brain.