BIOL 325 Lecture Notes - Lecture 16: Skeletal Muscle, Internal Capsule, Joint Capsule
Document Summary
We have no perception of some sensory information because it never reaches the cerebral cortex. How we make sense of everything around us: sensory modality, each unique type of sensation such as touch, pain, vision, or hearing is a sensory modality. General senses refer to both somatic senses and visceral senses. Somatic senses include tactile sensations (touch, pressure, vibration, itch, and tickle)thermal sensations (warm and cold), pain sensations, and proprioceptive sensations. Visceral senses: provide information about conditions within internal organs. Special senses sensory modalities of smell, taste, vision, hearing, and equilibrium or balance: process of sensation. Stimulus: the process of sensation begins in a sensory receptor, which can be either a specialized cell or the dendrites of a sensory neuron. As previously noted, a given sensory receptor responds vigorously to one particular kind of stimulus, a change in the environment that can activate certain sensory receptors. Selectivity: a sensory receptor responds only weakly or not at all to other stimuli.
