Practice Test - Intro / Somatosensory Systems

Question 1

The tissue responsible for the formation of CSF is:

Answer 1

Choroid Plexus

Question 2

Obstruction of the cerebral aqueduct would result in hydrocephalus in the:

Answer 2

Lateral Ventricles and 3rd Ventricle

Question 3

What is the outermost layer of the meninges? / What is it contiguous with?

Answer 3

The Dura mater is fibrous tissue that is contiguous with the inner periosteum of the skull

Question 4

What is the middle layer of the meninges?

Answer 4

Arachnoid Mater

Question 5

Through which layer of meninges does the CSF flow / is it responsible for CSF formation?

Answer 5

Arachnoid Mater / No

Question 6

Which layer of the meninges is in direct contact with the neural tissue of the CNS?

Answer 6

Pia Mater

Question 7

What are arachnoid granulations?

Answer 7

Valve-like structures that allow the CSF to flow from the subarachnoid space back into the venous system

Question 8

Which cell type makes the myelin of the central nervous system?

Answer 8

Oligodendroglial Cells

Question 9

Which cell type makes the myelin of the PNS?

Answer 9

Schwann Cells

Question 10

What is the role of Astrocytes? / Microglial Cells?

Answer 10

Help maintain BBB / Become activated following CNS damage & then scavenge degenerating cellular debris

Question 11

Which ventricular space is located within the temporal lobes?
A) Body of the lateral ventricles
B) Posterior horn of the lateral ventricles
C) 3rd Ventricle
D) Anterior horn of the lateral ventricles
E) Inferior horn of the lateral ventricles

Answer 11

E) Inferior horn of the lateral ventricles

Question 12

Name where each ventricle is located: Body of lateral ventricle / Posterior horn of lateral ventricle / 3rd Ventricle / Anterior horn of the lateral ventricle

Answer 12

Parietal Lobe / Occipital Lobe / Between the 2 thalami and hypothalami / Frontal Lobe

Question 13

What ventricular space is associated with the medulla? / What part of the brain is the Cerebral Aqueduct associated with?

Answer 13

4th Ventricle / Midbrain

Question 14

After leaving through arachnoid villi, what does the CSF drain into?

Answer 14

Superior Sagittal SInus

Question 15

Which of the following symptoms would most likely be associated with destruction of the RIGHT dorsal column of the spinal cord at T6?
A) Movement tremor in the left hand in the finger-to-nose-test
B) Movement tremor in the right hand in the finger-to-nose test
C) Falling when trying to walk in the dark
D) Resting tremor in the right hand
E) Resting tremor in the left hand

Answer 15

C) Falling when trying to walk in the dark - destruction of the dorsal columns at T6 would result in loss of proprioceptive feedback from the feet and legs, which is likely to cause unsteadiness when walking, especially in the dark when visual cues are limited.

Question 16

Movement tremors are usually associated with damage to what part of the brain?

Answer 16

Cerebellum

Question 17

Resting tremors are usually associated with what condition / damage to what part of the brain?

Answer 17

Parkinsons / Basal Ganglia

Question 18

The RIGHT medial lemniscus carries? / What does the left carry?:

Answer 18

Discriminative touch and proprioceptive information from the LEFT side of the body / Touch and proprioceptive info from RIGHT side

Question 19

What tract would carry pain and temperature information from the LEFT side of the body?

Answer 19

These sensory modalities are carried in the RIGHT anterolateral system.

Question 20

What tracts would carry motor information from the RIGHT cerebral cortex to the LEFT spinal cord?

Answer 20

Motor information is carried in the right corticospinal tract of the brain stem and in the left lateral corticospinal tract of the spinal cord.

Question 21

Which of the following regions of the nervous system is responsive to morphine by producing analgesia?

A. Anterolateral System (ALS).
B. Ventral Posterior nucleus of thalamus.
C. Medial Lemniscus.
D. Periaqueductal Grey.
E. Reticular Formation.

Answer 21

D. Periaqueductal Grey (Gray matter located around the cerebral aqueduct)

Question 22

Pain information from the left foot crosses the midline in which major subdivision of the central nervous system?

A. Midbrain.
B. Pons.
C. Thalamus.
D. Medulla.
E. Spinal cord.

Answer 22

E) Spinal Cord

Question 23

Destruction of what structure would result in the selective loss of pain and temperature sensations from the RIGHT side of the face, sparing other somatosensory sensations (i.e., tactile sensations)?

A. Lateral regions of the post-central gyrus of the right parietal lobe.
B. Lateral regions of the right medulla.
C. Right trigeminal ganglion.
D. Left trigeminal ganglion.
E. Lateral regions of the right thalamus.

Answer 23

B) Lateral regions of the RIGHT medulla

Question 24

T/F: The lateral regions of the post-central gyrus of the right parietal lobe subserves both pain and temperature as well as tactile sensations / Does this region subserve the left or right side of the fact?

Answer 24

True / LEFT

Question 25

The RIGHT trigeminal ganglion subserves both pain and temperature, as well as tactile sensations, from which side of the fact?

Answer 25

RIGHT

Question 26

Lateral regions of the RIGHT thalamus subserve both pain and temperature, as well as tactile sensations on which side of the face?

Answer 26

LEFT

Question 27

Neuronal cells within the Nucleus Gracilis make synaptic contact in what major subdivision of the brain?

Answer 27

Thalamus (Ventral Posterior nucleus)