Question 1

Which of the following best describes the difference between sensation and perception?

Accepted Answer

Sensation is the subconscious awareness of changes in the environment, while perception is the conscious interpretation of those changes, mainly by the cerebral cortex.

Question 2

A patient presents with loss of proprioception and vibration sense in the right leg. Which pathway is most likely affected?

Accepted Answer

Posterior column-medial lemniscus pathway

Question 3

Which sensory receptor type is primarily responsible for detecting pain and temperature?

Accepted Answer

Free nerve endings

Question 4

A person touches a hot stove and immediately withdraws their hand. Which type of pain is experienced first?

Accepted Answer

Fast pain

Question 5

Which of the following is TRUE regarding proprioceptors?

Accepted Answer

They are found in muscles and tendons and provide information about body position and movement.

Question 6

Which pathway carries somatic sensory impulses for pain, temperature, itch, and tickle from the body to the cerebral cortex?

Accepted Answer

Anterolateral (spinothalamic) pathway

Question 7

In the somatic sensory pathways, which neuron transmits impulses from the thalamus to the primary somatosensory area of the cortex?

Accepted Answer

Third-order neuron

Question 8

Which of the following best describes the decussation pattern of the lateral corticospinal tract?

Accepted Answer

90% of axons decussate in the medulla and enter the contralateral side of the spinal cord.

Question 9

A patient has difficulty maintaining posture and balance after head movements. Which pathway is most likely impaired?

Accepted Answer

Vestibulospinal pathway

Question 10

Which of the following is NOT a function of the cerebellum in motor control?

Accepted Answer

Initiating voluntary movement

Question 11

A lesion in the trigeminothalamic pathway would most likely affect which of the following?

Accepted Answer

Somatic sensations from the face, nasal cavity, oral cavity, and teeth

Question 12

Which equation best represents the relationship between the number of neurons in a somatic sensory pathway to the cortex?

Accepted Answer

Total neurons = $$N_{first} + N_{second} + N_{third}$$

Question 13

Which of the following is a plausible consequence of damage to the basal nuclei neurons?

Accepted Answer

Impaired coordination of voluntary movements and symptoms such as tremor and bradykinesia

Question 14

Which of the following tracts is involved in conveying proprioceptive impulses to the cerebellum for coordination of skilled movements?

Accepted Answer

Spinocerebellar tracts

Question 15

A patient with Parkinson’s disease is most likely to exhibit which of the following symptoms due to decreased dopamine production?

Accepted Answer

Tremor, bradykinesia, and hypokinesia

Question 16

Which of the following best describes the function of the reticular activating system (RAS)?

Accepted Answer

Controls wakefulness and sleep by filtering sensory input to the cerebral cortex

Question 17

Which equation would you use to calculate the total number of decussating axons in the lateral corticospinal tract if the total number of axons is $$N$$?

Accepted Answer

Number of decussating axons = $$0.90N$$

Question 18

Which area of the brain is primarily responsible for the conscious interpretation of language?

Accepted Answer

Wernicke’s association area

Question 19

A patient is unable to coordinate voluntary movements of the eyes, tongue, and neck. Which pathway is most likely affected?

Accepted Answer

Corticobulbar pathway

Question 20

Which of the following best explains why visceral pain is often felt in or just deep to the skin that overlies the stimulated organ?

Accepted Answer

Somatic and visceral sensory pathways converge in the central nervous system, leading to referred pain.

Sensory, Motor, and Integrative Systems: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards