^ Biswas A, Manivannan M, Srinivasan MA (2015). “Signals in tactile afferents from the fingers eliciting adaptive motor responses during precision grip”. “The sense of flutter-vibration: comparison of the human capacity with response patterns of mechanoreceptive afferents from the monkey hand”. a b Talbot WH, Darian-Smith I, Kornhuber HH, Mountcastle VB (March 1968). “Specific sensations evoked by activity in single identified sensory units in man”. ^ Torebjörk HE, Ochoa JL (December 1980). “Neural mechanisms of tactual form and texture perception”. “Medical gallery of Blausen Medical 2014.” staff (2014). Here is a quick five minute video also linked here which covers the four different kinds of mechanoreceptors:ī staff (2014). They also produce transient responses, but have large receptive fields. The Pacinian corpuscle or Vater-Pacinian corpuscles or Lamellar corpuscles underlie the perception of high frequency vibration.They have small receptive fields and produce transient responses to the onset and offset of stimulation. The Rapidly Adapting (RA) or Meissner corpuscle end-organ mechanoreceptor underlies the perception of flutter and slip on the skin.They also produce sustained responses to static stimulation, but have large receptive fields. The Slowly Adapting type 2 (SA2) mechanoreceptors, with the Ruffini corpuscle end-organ, respond to skin stretch, but have not been closely linked to either proprioceptive or mechanoreceptive roles in perception.They have small receptive fields and produce sustained responses to static stimulation. The Slowly Adapting type 1 (SA1) mechanoreceptor, with the Merkel corpuscle end-organ, underlies the perception of form and roughness on the skin.Furthermore, each has a different receptive field. Cutaneous mechanoreceptors can be categorized by morphology, by what kind of sensation they perceive, and by the rate of adaptation. They are all innervated by Aβ fibers, except the mechanorecepting free nerve endings, which are innervated by Aδ fibers. They are located in the skin, like other cutaneous receptors. The lamellar corpuscles (also known as Pacinian corpuscles) in the skin and fascia detect rapid vibrations (of about 200–300 Hz).Ĭutaneous mechanoreceptors respond to mechanical stimuli that result from physical interaction, including pressure and vibration. The Merkel nerve endings (also known as Merkel discs) detect sustained pressure. The bulbous corpuscles (also known as Ruffini endings) detect tension deep in the skin and fascia. The tactile corpuscles (also known as Meissner corpuscles) respond to light touch and adapt rapidly to changes in texture (vibrations around 50 Hz). In glabrous (hairless) skin, there are four principal types of mechanoreceptors, each shaped according to its function (Fig.2.3.1). Mechanoreceptors are distributed at different depths and respond to different temporal frequencies and types of pressure. Know the different rates of adaptation in cutaneous mechanoreceptors. Know what role the two corpuscles and two nerve endings play in the skin. Knows the four types of mechanoreceptors in the skin.
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