Lecture 9 - Sensory Information Flashcards
types of sensory (receptor) information
Exteroception
- > information located from outside (i.e. sound, light)
Interoception
- > information located from inside
types of interoception
- > refers to sensory information that pertains to movement (posture)
types of proprioceptors
- > muscle spindles
- > golgi tendon organs
- > articular receptors
- > cutaneous receptors
- > vestibular apparatus
muscle spindles
located in skeletal muscle in series with muscle fibres
- > muscle spindles will lengthen/stretch and shorten when the muscle shortens
- > muscle spindle provides information on the length and velocity of muscle contraction
- > muscle spindles act to resist muscle stretch via the stretch reflex
golgi tendon organ
- > located in the muscle-tendon junction
*tendon connects muscle to bone
- > responds to muscle tension
characteristics of the joint capsule
articular receptor cells respond to distortions in the joint capsule (a result from movement) especially at the extreme ranges
cutaneous receptors
sensory receptors located in the skin that respond to various types of stimuli (5 senses)
vestibular apparatus
located in the inner ear, very complex system
- > responds to changes in head movement, as well as to its orientation/alignment in gravity
two visual systems for movement control
focal vision
ambient vision
characteristics of focal vision
WHAT
- > a visual system that is specialized for object identification
- > involves primarily the central visual field
- > is degraded by low/poor light
- > is a “slow” and conscious process
characteristics of ambient vision
WHERE
- > visual system specialized for motor control
- > involves both central and peripheral visual fields
- > not degraded by low light
- > is fast and non-conscious process
optic flow
*AMBIENT VISION*
refers to changing patterns of light on the retina of the eye
- > the retinal image is inverted (upside down) and then corrected by the brain
optic flow provides information on ______
- > direction of movement relative to fixed objects, and vice versa
- > direction of movement relative to moving objects
