$$ W_{apparent} = W_{actual} - V_{brain} \times \rho_{CSF} \times g $$

Question 1

Which of the following best describes the function of cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

CSF cushions the brain, provides buoyancy, and maintains chemical stability.

Question 2

A newborn presents with an enlarged head and unfused skull bones. Which condition is most likely responsible, and what is the underlying cause?

Accepted Answer

Hydrocephalus; obstruction of CSF circulation or drainage.

Question 3

Which structure produces cerebrospinal fluid (CSF) in the brain?

Accepted Answer

Choroid plexus

Question 4

CSF flows from the lateral ventricles to the third ventricle through which structure?

Accepted Answer

Interventricular foramen

Question 5

Which meningeal layer is directly attached to the surface of the brain and spinal cord, and contains tiny blood vessels?

Accepted Answer

Pia mater

Question 6

A patient with a lesion in Broca’s area would most likely exhibit which symptom?

Accepted Answer

Slow speech and difficulty choosing words

Question 7

Which pathway is responsible for transmitting discriminative touch and vibration from the body to the somatosensory cortex?

Accepted Answer

Medial lemniscal pathway

Question 8

Which of the following is TRUE regarding the reticular activating system (RAS)?

Accepted Answer

RAS keeps the cerebral cortex conscious and filters out repetitive stimuli.

Question 9

Which brain structure is most closely associated with emotional responses such as fear and aggression?

Accepted Answer

Amygdaloid body (amygdala)

Question 10

Which of the following best describes the difference between short-term memory (STM) and long-term memory (LTM)?

Accepted Answer

STM is temporary and stored in the hippocampus; LTM is permanent and stored in the cerebral cortex.

Question 11

Which equation best represents the reduction in brain weight due to CSF buoyancy, given that the brain and CSF have the same density?

Accepted Answer

$$ W_{apparent} = W_{actual} - V_{brain} 	imes ho_{CSF} 	imes g $$

Question 12

Which of the following is a consequence of damage to the reticular formation?

Accepted Answer

Coma due to loss of consciousness

Question 13

Which spinal cord tract is responsible for transmitting proprioceptive information to the cerebellum?

Accepted Answer

Spinocerebellar tract

Question 14

Which of the following best explains the mechanism of psychosomatic illness?

Accepted Answer

Emotional stress from the limbic system affects autonomic function via the hypothalamus.

Question 15

Which of the following is NOT a function of the limbic system?

Accepted Answer

Regulation of heart rate

Question 16

Which equation best describes the relationship between the number of synapses eliminated during sleep and the total synapses present?

Accepted Answer

$$ N_{final} = N_{initial} - N_{eliminated} $$

Question 17

Which of the following best describes the function of the dorsal horn in the spinal cord?

Accepted Answer

Receives input from somatic and visceral sensory neurons

Question 18

Which pathway is responsible for fast and fine movements of skeletal muscles?

Accepted Answer

Corticospinal (pyramidal) pathway

Question 19

Which of the following is a key feature of ascending spinal tracts?

Accepted Answer

They relay sensory information through a chain of two or three neurons.

Chap 12 CNS - Part 2 - McNeese, Duck

스터디 가이드 - 연습 문제