Question 1

Which of the ventricles is located directly superior to the cistern cerebellomedullaris?

Accepted Answer

The fourth ventricle is located directly superior to the cistern cerebellomedullaris.

Question 2

What is the name of the passageway from the third to fourth ventricle?

Accepted Answer

The passageway from the third to fourth ventricle is called the cerebral aqueduct. Foramen of Monro connects the lateral ventricles to the third ventricle, Interventricular foramen is another name for Foramen of Monro, and Foramen of Luschka connects the fourth ventricle to the subarachnoid space.

Question 3

Which of the following structures filters the blood to produce CSF?

Accepted Answer

The choroid plexus is a structure within the ventricles of the brain that filters blood to produce cerebrospinal fluid (CSF). Arachnoid granulations and villi are involved in the reabsorption of CSF, not its production. The ventricles themselves do not filter blood, but they do contain CSF.

Question 4

Which of the following structures is attached to the roof of the third ventricle?

Accepted Answer

The pineal gland is attached to the roof of the third ventricle by a stalk-like structure called the pineal stalk or habenular commissure. This gland is responsible for the production of the hormone melatonin, which helps regulate sleep-wake cycles. The pituitary gland, on the other hand, is located at the base of the brain and is attached to the hypothalamus by the pituitary stalk. The fourth ventricle is a cavity located in the brainstem, while the lateral recesses are extensions of the fourth ventricle.

Question 5

Which layer of the meninges is located closest to the brain?

Accepted Answer

The pia mater is the innermost layer of the meninges and is located closest to the brain.

Question 6

What is the name of the white brain structure that connects the two cerebral hemispheres?

Accepted Answer

The white brain structure that connects the two cerebral hemispheres is called the corpus callosum. The central sulcus is a groove that separates the frontal and parietal lobes. The falx cerebri is a fold of dura mater that separates the two cerebral hemispheres. The insula is a region of the cerebral cortex located deep within the lateral sulcus.

Question 7

The two divisions of the central nervous system include the brain and:

Accepted Answer

The two divisions of the central nervous system include the brain and spinal cord. The meninges are protective membranes that surround the brain and spinal cord. Spinal nerves are part of the peripheral nervous system, and neurons are individual nerve cells that make up the nervous system.

Question 8

Which meningeal space contains cerebrospinal fluid (CSF)?

Accepted Answer

The subarachnoid space contains cerebrospinal fluid (CSF), which provides cushioning and nutrition to the brain and spinal cord. The subdural space is between the dura mater and arachnoid mater, and the pia space is the innermost layer of the meninges which adheres to the surface of the brain and spinal cord. There is no such space as the "cerebral fluid space."

Question 9

What is the name of the channels located between the cranium and dura mater that contain blood?

Accepted Answer

The channels located between the cranium and dura mater that contain blood are called dural mater sinuses. The subdural space is located between the dura mater and arachnoid mater, the epidural space is located between the skull and dura mater but does not contain blood, and the subarachnoid space is located between the arachnoid mater and pia mater and also contains cerebrospinal fluid.

Question 10

Which of the following is not a major division of the brain?

Accepted Answer

The other three choices (forebrain, hindbrain, midbrain) are all major divisions of the brain. "Posterior brain" is not a commonly used term to refer to a major division of the brain.

Question 11

On the average, how much CSF is formed daily?

Accepted Answer

Approximately 500 mL of cerebrospinal fluid (CSF) is produced daily in the human body.

Question 12

At what vertebral level is the tapered, terminal part of the spinal cord found?

Accepted Answer

The tapered, terminal part of the spinal cord is known as the conus medullaris, and it is typically found at the level of the lower border of L1.

Question 13

A condition caused by an abnormal amount of CSF in the ventricles is termed:

Accepted Answer

Hydrocephalus is a condition caused by an abnormal accumulation of cerebrospinal fluid (CSF) in the ventricles of the brain, leading to enlargement of the head in infants and pressure on the brain in adults. Cerebral atrophy refers to a shrinking of brain tissue, pneumoencephalos refers to the presence of air in the cranial cavity, and encephalitis is inflammation of the brain. None of these conditions specifically involve abnormal amounts of CSF in the ventricles.

Question 14

What type of neuron conducts electric impulses toward the cell body?

Accepted Answer

Dendrites are the branch-like extensions of the neuron that receive stimulation from other neurons and conduct electric impulses toward the cell body.

Question 15

The common lumbar puncture site is located at the vertebra level of:

Accepted Answer

The common lumbar puncture site is located at the L3-L4 vertebra level to avoid damage to the spinal cord, which typically ends at the L1-L2 level in adults.

Question 16

What is the name of the deep fissure that separates the two cerebral hemispheres?

Accepted Answer

The deep fissure that separates the two cerebral hemispheres is known as the longitudinal fissure.

Question 17

Along with the posterior pituitary gland and the infundibulum, what other structure or region is associated with the hypothalamus?

Accepted Answer

The optic chiasm is associated with the hypothalamus, as it is located just below the hypothalamus. It is where the optic nerves partially cross, playing a crucial role in the visual system.

Question 18

What is the name for the enlarged regions of the subarachnoid space?

Accepted Answer

The enlarged regions of the subarachnoid space are known as cisterns. These spaces are filled with cerebrospinal fluid (CSF) and act as reservoirs of CSF. Some examples of cisterns include the cisterna magna, ambient cistern, and interpeduncular cistern.

Question 19

Which structure of the neuron carries electric impulses away from the cell body?

Accepted Answer

The axon is a single, elongated structure that carries electric impulses away from the cell body towards the terminals which then pass on to other neurons or body tissues. Dendrites are the structures that receive signals from other neurons and carry them towards the cell body. Nerve cell and multipolar neuron are more general terms used to describe any neuron with a single axon and multiple dendrites or neurons with multiple axons and dendrites respectively.

Question 20

What is the name of the tapered, terminal part of the spinal cord?

Accepted Answer

The tapered, terminal part of the spinal cord is called the conus medullaris. Option A, medulla spinalis, refers to the entire spinal cord. Option B, encephalon, refers to the brain. Option C, axon, is a part of a neuron that transmits signals.

Quiz 18: Computed Tomography