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Transcript
Mechanoreceptors Mechanoreceptors - Mechanoreceptors are stimulated by mechanical compression or stretch at the receptor or surrounding tissues. - Found in skin for sensing contact with physical world. -Found in bladder, blood vessels, heart, digestive organs, and teeth to sense pressure. - Mechanoreceptors are innervated by myelineated axons. Mechanoreceptors Receptors can be classified according to the type of stimulus into: 1-Tocuh receptors in the skin which are stimulated by light mechanical stimuli. 2-Pressure receptors in the subcutaneous tissues which are stimulated by deep mechanical stimuli. 3-Stretch receptors in the skeletal muscles, lungs, right atrium, urinary bladder, stomach, intestine and rectum. 4-Joint receptors which send information about the position and movement of the of the joint. 5- Auditory receptors which are stimulated by sound waves Types of Mechanoreceptors Types of Mechanoreceptors Type Adaptation Very rapidly Rapidly Rapidly Location Nerve fiber Sensation encoded Subcutaneous A-delta Vibration , pressure Dermis (Nonhairy skin ) A-delta Vibration , light touch A –delta Movement of hair Stretch,joint rotation Hairy skin Slowly Dermis(hairy), Ligament, tendon A-delta Slowly Epidermis (nonhairy skin) A-delta Slowly Hairy skin A-delta Light touch Light touch DONE BY: Fahad Tami Alzahrani 430102544