Chapter 16: Sensations and Motor Systems Flashcards
Describe somatic sensory receptors
able to sense touch, pressure, vibration, warmth, cold, and pain
describe visceral sensory receptors
Conscious sensations arising from the viscera, in addition to pain, include organ filling, bloating and distension, dyspnea, and nausea
describe the special sensory receptors
the 5 senses (vision, hearing, touching, smelling, tasting)
where are tactile, thermal, proprioception somatic sensory receptors found
located in the skin, subcutaneous layer, and the mucous membranes of the mouth, vagina and anus.
where are somatic sensory receptors found for touch
hair root plexes and type II cutaneous mechanoreceptors
where are pressure somatic receptors found
located on type I and type II mechanoreceptors
where are vibration somatic sensory receptors found
located on corpuscles of touch and lamellated corpuscles
where are itch, tickle, and thermoreceptors found
where are pain (noiceptors) found
free nerve endings found in every body tissue.
difference between Myelinated A and myelinated C
A: fast pain
C: slow pain
Nerve impulses for touch, pressure, vibration ascend along:
posterior column medial lemniscus pathway
impulses for pain, temp, itch, tickle ascend along:
anterolateral (spinothalamic) pathway
impulses for “most somatic sensations” (tactile, pain, proprio, face and oral cavity)
ascend along trigeminothalamic
subconscious proprioception ascends along
spinocerebellar
Primary motor area
major control centre for voluntary movements
