BISC276 Lecture Notes - Lecture 16: Spasticity, Non-Rapid Eye Movement Sleep, Amyotrophic Lateral Sclerosis

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Sensation: sensation is a conscious or unconscious awareness of external or internal stimuli (broadest definition) Our blood pressure is constantly being monitored, yet we do not consciously perceive this because it occurs in the medulla oblongata rather than the cerebral cortex) Types of sensation: (sensory modalities: general senses: include both somatic and visceral senses, which provide information about conditions within internal organs. (tactile, thermal, pain, and proprioception) Ttpp: special senses: include smell, taste, vision, hearing, and equilibrium (balance). Somatic refers to the body shell (skin, skeletal muscle & the skeleton) (ttpp + 5 special senses) Most stimuli are in the form of energy such as mechanical (sound), electromagnetic (light) or chemical (molecule of glucose: mechanoreceptors: mechanical pressure (touch, pressure, stretch ) (ex. In cochlea: thermoreceptors: temperature, nociceptors: pain resulting from tissue damage. 1: photoreceptors: light, respond to photons, chemoreceptors: chemicals (taste-smell, microscopic level (structure) Whole cell (taste, inner ear, vision: adaptation in sensory receptors.

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