Sensational Somatosensory System Quiz

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24 Questions

Which type of receptor functions over a broad range of temperatures with some overlap in the moderate temperature range?

Warm receptors

What is the basis for the reduced threshold for pain, known as hyperalgesia?

Release of substances sensitizing the nociceptors to stimuli

Which type of pain is poorly localized and characterized as aching, burning, or throbbing?

Slow pain

What is the phenomenon that explains why people describe the taste of chili peppers as 'hot'?

Activation of transient receptor potential (TRP) channels by capsaicin

Which type of nociceptor is supplied by myelinated A-delta afferent nerve fibers and responds to mechanical stimuli such as sharp, pricking pain?

Thermal or mechanical nociceptors (TRPV or TRPM8 channels)

What type of pain is carried on C fibers and is characterized as aching, burning, or throbbing pain that is poorly localized?

Slow pain

What is the phenomenon that gives a cold sensation and involves the activation of TRPM8 channels by compounds like menthol?

Transduction of cold temperatures

What type of nociceptor is supplied by unmyelinated C fibers and responds to high-intensity mechanical or chemical stimuli and hot and cold stimuli?

Polymodal nociceptors

What type of pain is carried on A delta, group II, and group III fibers, has a rapid onset and offset, and is precisely localized?

Fast pain

What type of pain is of visceral origin that is misperceived as pain arising from a somatic location?

Referred pain

What is the phenomenon where pain is misperceived as arising from a somatic location according to the dermatomal rule?

Referred pain

What is the name of the map of the body that is called the somatosensory homunculus?

Somatosensory homunculus

Which type of information is processed by the somatosensory system?

Touch, position, pain, and temperature

Which type of information is processed by the dorsal column system?

Fine touch, pressure, two-point discrimination, and vibration

Which type of nerve fibers are mainly found in the anterolateral system (Spinothalamic pathway)?

Group III and group IV fibers

Where do the axons of the second-order neuron in the anterolateral system (Spinothalamic pathway) cross the midline?

In the spinal cord

Where is the third-order neuron located in the somatosensory pathway?

In the thalamus

What does the somatotopic arrangement in the thalamus mean?

It means that somatosensory information from one side of the body is received in the contralateral thalamus

Where is the fourth-order neuron located in the somatosensory pathway?

In the somatosensory cortex

What type of representation does the somatosensory cortex have?

Somatotopic representation

Which type of information is mainly processed by the dorsal column system?

Fine touch and pressure

Where do the axons of the second-order neuron in the dorsal column system cross the midline?

In the brain stem

What is the function of the fourth-order neuron in the somatosensory pathway?

Located in the somatosensory cortex and integrates complex information

What type of information is processed by the anterolateral system (Spinothalamic pathway)?

Pain, temperature, and light touch

Test your knowledge of the somatosensory system and pain sensations with this quiz. Explore topics such as touch, position, pain receptors, temperature, and the pathways for somatosensory information to the central nervous system. Perfect for students and professionals in the field of neuroscience or healthcare.

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