BIOL 171 Lecture Notes - Lecture 12: Lamellar Corpuscle, Spasm, Nociceptor
Document Summary
Sensory, motor, and integrative systems sensory: how info gets from receptors to brain through spinal cord motor: how info gets down from brain (motor cortex) to effectors. Sensation: conscious or unconscious awareness of any stimulus. Perception: conscious awareness of the meaning of a sensation. Classi cation of receptors by location exteroreceptors: receive external stimuli near surface of body hearing, vision, smell, taste, touch, pressure, pain, vibration, temperature interoreceptors: monitor internal environment not conscious of info transfer except pain and pressure. *proprioceptors: sense body position and movements in muscle, tendons, joints, inner ear. Tickle perception something has touched the skin discriminative touch provides location, texture of source sustained sensation over a large area rapid, repetitive sensory signals chemical irritation of free nerve endings stimulation of free nerve endings. Merkel disc discriminative touch located at surface of skin: light pressure and fast information. Ruf ni corpuscle pressure sustained touch: aware of holding hands, etc.
