MOVESCI 110 Lecture Notes - Lecture 3: Lamellar Corpuscle, Central Sulcus, Proprioception
14 Sep 2016
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Movesci 110 motor control lecture #4 sensory system and proprioception. Perception: sensation: the activation of stimuli from receptor to action potentials which is sent to the brain. Posterior to the central sulcus: perception: the organization, identification and interpretation of sensory information in order too represent and understand the environment. Hypodermis: receptors are found in the first two layers of the skin. Deep pressure and stretch of skin: they sense. Muscle spindle: intrafusal fibers that run parallel to regular muscle fibers, send signals regarding changes in muscle length, afferent signals leave according to two different groups. Group i measures length and velocity of lengthening. Group ii measures length: information can be referencing both static dynamic, increase in frequency in signals represents lengthening of muscle. Golgi tendon organ: gtos sense muscle tension via the tendon, change is sensed during muscle contraction, they tell muscles to stop contracting as a safety measure.
