Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

► Med - Neuroanatomy > Exam #3: Organization of the Brainstem > Flashcards

Exam #3: Organization of the Brainstem Flashcards

1
Q

What is the only pure sensory CN nucleus located in the brainstem?

A

CN VIII

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the importance of the sulcus limitans?

A

This is the anatomic demarcation of motor & sensory function:

  • Medial= motor
  • Lateral= sensory
  • Intermediate= both
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Embryologically, what structure are the sensory nuclei derived from?

A

Alar plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Embryologically, what structure are the motor nuclei derived from?

A

Basal plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What cell type lines the ventricular system/ central canal?

A

Ependymal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the mylencephalon?

A

Medulla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the landmark for the rostral medulla?

A

Open 4th ventricle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the significance of the open 4th ventricle in the medulla, from an embryological standpoint?

A

Formation of the 4th ventricle causes the sensory nuclei to transition from a dorsal position to a dorsolateral position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the mesencephalon?

A

Midbrain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the metencephalon?

A

Cerebellum & pons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the landmarks for the caudal medulla?

A

Caudal= closed 4th ventricle

  • Olivary nuclei
  • Pyramids
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What long tracts are contained in the pyramids of the medulla?

A

Corticospinal tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the function of the corticospinal tracts?

A

Motor output (UMN)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the function of the medial lemniscus?

A

Proprioception & discriminative touch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the internal arcuate fibers associated with?

A

DC/ML

*These are the fibers that cross from the DC to the ML

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the open 4th ventricle signify on cross-section?

A

Rostral medulla

17
Q

What are the landmarks for the caudal pons?

A

Basis pontis
Open 4th ventricle
Cerebellum

18
Q

What is the landmark for the caudal midbrain?

A

SCP decussation

19
Q

What CN nuclei is associated with the caudal midbrain?

20
Q

What is the landmark for CN IIII?

A

Red nucleus

21
Q

Where do the pyramids decussate?

A

Caudal medulla (spinomedullary junction)

  • Lateral cross
  • Anterior don’t
22
Q

Where does the spinothalamic tract cross?

A

At the spinal level innervated

23
Q

Where does the DC/ML decussate?

A

Caudal medulla via the internal arcuate fibers

24
Q

What is the function of the solitary nucleus?

A

Taste from CN X, IX, & VII

Thus, it is in the medulla ( CN IX & X) and the pons (VII)

► Med - Neuroanatomy (36 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions