SIU Neurology Resident Neuroscience Course

Chapter 22. The Bodily Senses

1. Glabrous skin is characterized by
1. Presence of hair
2. Circular arrays of ridges (e.g. fingerprints)
3. Small numbers of sensory receptors
4. Relatively small representation in the sensory homonculus
2. Humans are most sensitive to vibrations at a frequency of
1. 5-15 Hz
2. 20-50 Hz
3. 200-250 Hz
4. 1000-1500 Hz
3. There are specific skin receptors for
1. Cold and warm
2. Cool, cold, warm, and hot
3. Cool, cold, warm, hot, and extremely hot
4. Magnetism (the receptors activated by magnetic bracelets)
4. Nociceptors respond directly to
1. Pressure
2. Heat
3. Chemicals
4. Nocere
5. C fibers in peripheral nerve are
1. Rapidly conducting myelinated fibers
2. Rapidly conducting unmyelinated fibers
3. Slowly conducting unmyelinated fibers
4. Slowly conducting large diameter fibers

Chapter 23. Touch

1. Neurons in the posterior parietal areas (Brodmann's areas 2, 5, and 7) can respond to
1. Direction
2. Orientation
3. Shape
4. All of the above
2. Which person will have the largest proportion of sensory cortex devoted to the fingers
1. A tennis player
2. A pianist
3. A neurology resident
4. All will be equal
3. If a scientist is studying "barrel cortex", the experimental species is likely to be
1. Human
2. Non-human primate
3. Rodent
4. Drosophila
4. In general, information from both deep tissue and superficial skin sensory receptors projects to the same cortical columns in primary sensory cortex
1. True
2. False
5. Which has the largest sensory receptive fields?
1. Dorsal root ganglion cells
2. Area 3b neurons
3. Area 2 neurons
4. Area 5 neurons