Proprioceptive sensations kinesthesia and weight discrimination – Pain sensations The table below describes some somatic sensory receptors: Receptor Type Description Receptor Class * Sensation Adaptation Tactile Receptors Touch corpuscle Capsule surrounds mass of (S) Encapsulated Touch, pressure, Rapid dendrites in dermal papillae of (L) Exteroreceptor slow vibrations hairless skin (St) Mechanoreceptor Hair root plexus Free nerve endings wrapped (S) Unencapsulated Touch Rapid around hair follicles in skin (L) Exteroreceptor (St) Mechanoreceptor Lamellated Oval, layered capsule surrounds (S) Encapsulated Pressure and fast Rapid corpuscle dendrites in dermis and (L) Exteroreceptor vibrations layer (St) Mechanoreceptor Itch receptor Free nerve endings in skin and (S) Unencapsulated Itch Both slow mucous membranes (L) Exteroreceptor and rapid (St) Mechanoreceptor Thermoreceptors Warm and cold Free nerve endings in skin and (S) Unencapsulated Warmth up to 48C Rapid receptors mucous membranes (L) Exteroreceptor Cold down to 10C (St) Thermoreceptor Proprioceptors Muscle spindle Sensory nerve endings wrapped (S) Encapsulated Muscle stretch and Slow around specialized muscle fibers (L) Proprioceptor length (St) Mechanoreceptor Tendon organ Capsule surrounds mass of (S) Encapsulated Tendon stretch and Slow dendrites at junction of tendon (L) Proprioceptor tension and muscle (St) Mechanoreceptor Joint kinesthetic Lamellated corpuscles, tendon (S) Encapsulated position and Rapid receptors organs, and free nerve endings (L) Proprioceptors movement within and around synovial joints (St)Mechanoreceptors Pain receptors Nociceptor Free nerve endings in every (S) Unencapsulated Pain and extremes Slow tissue of the body except the (L) Exteroreceptor in temperature brain and cartilage (St) Nociceptor * (S) structure; (L) location; (St) stimulus type
Proprioceptive sensations – kinesthesia and weight discrimination Pain sensations The table below describes some somatic sensory receptors: Receptor Type Description Receptor Class * Sensation Adaptation Tactile Receptors Touch corpuscle Capsule surrounds mass of dendrites in dermal papillae of hairless skin (S) Encapsulated (L) Exteroreceptor (St) Mechanoreceptor Touch, pressure, slow vibrations Rapid Hair root plexus Free nerve endings wrapped around hair follicles in skin (S) Unencapsulated (L) Exteroreceptor (St) Mechanoreceptor Touch Rapid Lamellated corpuscle Oval, layered capsule surrounds dendrites in dermis and layer (S) Encapsulated (L) Exteroreceptor (St) Mechanoreceptor Pressure and fast vibrations Rapid Itch receptor Free nerve endings in skin and mucous membranes (S) Unencapsulated (L) Exteroreceptor (St) Mechanoreceptor Itch Both slow and rapid Thermoreceptors Warm and cold receptors Free nerve endings in skin and mucous membranes (S) Unencapsulated (L) Exteroreceptor (St) Thermoreceptor Warmth up to 48C Cold down to 10C Rapid Proprioceptors Muscle spindle Sensory nerve endings wrapped around specialized muscle fibers (S) Encapsulated (L) Proprioceptor (St) Mechanoreceptor Muscle stretch and length Slow Tendon organ Capsule surrounds mass of dendrites at junction of tendon and muscle (S) Encapsulated (L) Proprioceptor (St) Mechanoreceptor Tendon stretch and tension Slow Joint kinesthetic receptors Lamellated corpuscles, tendon organs, and free nerve endings within and around synovial joints (S) Encapsulated (L) Proprioceptors (St)Mechanoreceptors position and movement Rapid Pain receptors Nociceptor Free nerve endings in every tissue of the body except the brain and cartilage (S) Unencapsulated (L) Exteroreceptor (St) Nociceptor Pain and extremes in temperature Slow * (S) structure; (L) location; (St) stimulus type
sensory-motor_pathways_notes_2016.docx