HEAL609 weeks 6-12

For Test 2

nociceptors

Receptors that respond to damaging stimuli that result in

pain. they are free-branching, unmyelinated nerve endings

thermoreceptors

Receptors that respond to temperature changes

mechanoreceptors

Receptors that respond to respond to pressure and distortion such as: touch, pressure, vibration, and stretch.

photoreceptors

Receptors that respond to light

exteroceptors

detect stimuli coming from the external environment e.g touch, pressure, pain, temperature. Also include sensory receptors for vision, hearing, balance, taste, and smell.

propiroceptors

detect joint and muscle movement and give information about body position.

interoceptors / visceroceptors

detect stimuli within internal organs.

referred pain

occurs when sensory nerve signals from certain viscera are perceived as originating not from that organ, but from somatic sensory receptors within the skin and skeletal muscles.

phantom limb pain

involves conscious perception and sensation of body parts that have been removed

Lateral spinothalamic tract

conducts nerve signals for pain and temperature

A delta nerve fiber

large, myelinated sensory fibers that transmit impules about sharp, localised pain to the CNS. transmit them quickly

C nerve fiber

un myelinated sensory fibres that transmit dull, slow, aching pain impulses