Which of the following pathways carries fibers that control fine touch, vibration, proprioception, and pressure? A. Dorsal column B. Spinothalamic C. Corticospinal D. Reticulospinal

Which extrapyramidal tract incorporates equilibriumsensations with motor commands to aid in posture andmovement?a. tectospinal tractb. vestibulospinal tractc. reticulospinal tractd. corticospinal tract

What type of glial cell is responsible for filtering blood to produce CSF at the choroid plexus?a. ependymal cellb. astrocytec. oligodendrocyted. Schwann cell

The motor system is organized differently in the spiral cord compared to the cortex. Choose the statement below that best describes the difference. a. Alpha motor neurons in the ventral horn are mapped according to muscle location, while cortical motor neurons are organized into purposeful movement groups. b. None of the answers. c. Alpha motor neurons in the ventral horn have a different segment-to-segment organization, while cortical motor neurons are mapped similarly to the somatosensory system. d. Alpha motor neurons in the ventral horn do not have a clear organization, while cortical motor neurons are mapped according to muscle location. e. Alpha motor neurons in the ventral horn are organized into complex movement groups, while cortical motor neurons have no clear organization.

Which is true regarding somatotopic organization? Select one:   a. Certain areas of the body have much higher representation in the primary somatosensory cortex than other areas, and these regions will have finer tactile discrimination.   b. The representation of a given area of the body in the primary somatosensory cortex is directly proportional to the size of that body area (e.g., the right index finger has less representation than the right thigh).   c. The receptive fields for somatosensory neurons are circular and relatively consistent in size across areas of the body, but areas of the body with the finest tactile discrimination have many more neurons representing them in the primary somatosensory cortex.    d. There is equal representation of all areas of the body in the primary somatosensory cortex

Following a motorcycle accident, the victim loses the ability to move the right leg but has normal control over the left one, suggesting a hemisection somewhere in the thoracic region of the spinal cord. What sensory deficits would be expected in terms of touch versus pain? Explain your answer.

Explain the ascending pathway of how the information about touch sensation travels from the right arm up to the brain where he is aware that he has been touched. (Use complete sentences.) Use these key words in this order: sensory neuron, radial nerve in brachial plexus, spinal nerve, dorsal root ganglion, dorsal root, dorsal horn in cervical spinal cord, ascending tract, decussate, somatosensory cortex in postcentral gyrus, parietal lobe, Mr. Dexter thinks “Someone touched my arm.”)

Which of the following regions does the posterior parietal cortex output information to? Select all that apply: a. Primary Visual Cortex b. Frontal Eye Fields c. Primary Motor Cortex d. Tertiary Motor Cortex e. Secondary Motor Cortex f. Dorsolateral Prefrontal Cortex

Explain the physiology of ascending pathways by placing each word or phrase into the blanks to complete the sentences. posterior horn tactile corpuscles spinoreticular tract primary somatosensory anterior horn spinothalamic tract contralateral ipsilateral prior to decussation A feather is rubbed over a section of skin on the palm of the hand, eliciting an action potential that was generated from neurons associated with Action potentials traveling in the posterior root reach the synapse with second order neurons located in the of the spinal cord. The transfer of electrical signals between first and second order neurons occurs Second order neurons ascend the spinal cord in the Arriving on the transferred to third order neurons. side of the thalamus, action potentials are Third order neurons arrive in the comprehension occurs. Reset cortex, where conscious

Which of these pathways is not an ascending (sensory) pathway?a. spinothalamic tractb. corticospinal tractc. dorsal-column/medial-lemniscal systemd. trigeminothalamic tracte. spinocerebellar tract