PSYC2091 Biological Psychology: Pain & Touch Quiz

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What is the main difference between the touch and pain pathways in the spinal cord?

Touch pathway ascends ipsilaterally while pain pathway ascends contralaterally (correct)

Touch pathway projects to the cerebellum while pain pathway projects to the thalamus

Touch pathway uses A-beta fibers while pain pathway uses A-delta and C fibers

Touch pathway synapses in the dorsal horn while pain pathway synapses in the ventral horn

What is the primary role of proprioception?

Transmitting signals from the skin to the spinal cord

Providing a sense of limb position and movement (correct)

Sensing heat and cold

Encoding tissue damage

What condition did Ian Waterman have that resulted in a loss of proprioceptive sense?

Damage to the vestibular system in his inner ear

Stroke affecting the somatosensory cortex in his brain

Spinal cord injury affecting the dorsal column-medial lemniscus pathway

Neuropathy affecting the sensory neurons in his joints and skin (correct)

Which type of sensory receptors are responsible for proprioception?

Mechanoreceptors Signup and view all the answers

How are the touch/proprioception and pain pathways linked in the brainstem?

They converge and travel together in the medial lemniscus pathway Signup and view all the answers

What are the three main functions of somatosensory receptors in the body?

Nociception, hapsis, and proprioception Signup and view all the answers

Which type of skin receptors are responsible for detecting warmth, cold, pressure, vibrations, stretch, itch, and pain?

Free nerve endings and specialized receptor organs Signup and view all the answers

Which areas of the skin have higher haptic acuity (ability to perceive touch sensations)?

Areas with higher density of skin receptors Signup and view all the answers

How do mechanoreceptors in the skin respond to pressure or touch stimuli?

By opening or closing mechanically gated ion channels Signup and view all the answers

What is the difference between 'fast adapting' and 'slow adapting' mechanoreceptors in the skin?

Fast adapting receptors respond only at the beginning and end of stimulation, while slow adapting receptors respond continuously Signup and view all the answers

PSYC2091 Biological Psychology: Pain & Touch Quiz

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