Exam 1: Brainstem 2: Pons and Trigeminal Sensory System + some of midbrain (CN nuclei origins diagrams for pons included in Brainstem 1 deck) Flashcards
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/876/011/q_image_thumb.png?1453378557)
Pyramid
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/876/011/a_image_thumb.png?1453378758)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/702/q_image_thumb.png?1453378741)
Decussation of Pyramids*
*At the caudal medulla, where the corticospinal tracts decussate!
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/702/a_image_thumb.png?1453378771)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/813/q_image_thumb.png?1453379026)
Dorsal root of spinal nerve
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/813/a_image_thumb.png?1453378827)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/827/q_image_thumb.png?1453379045)
Gracile fasciculus
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/827/a_image_thumb.png?1453378851)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/829/q_image_thumb.png?1453379130)
Spinal accessory nucleus (CN XI)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/829/a_image_thumb.png?1453378857)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/839/q_image_thumb.png?1453379155)
Medial motor nuclei
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/839/a_image_thumb.png?1453378863)
How far down does the trigeminal tract go?
What is it analogous with?
the trigeminal tract goes all the way into the spinal cord
it becomes analogous with Lissauers tract
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/178/a_image_thumb.png?1453379340)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/924/q_image_thumb.png?1453379570)
Solitary nucleus (CN VII, IX, X)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/877/924/a_image_thumb.png?1453379497)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/450/q_image_thumb.png?1453379709)
Spinal trigeminal nucleus (CN V, VII. IX, X)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/450/a_image_thumb.png?1453379505)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/451/q_image_thumb.png?1453379984)
Solitary nucleus (CN VII, IX, X)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/451/a_image_thumb.png?1453379808)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/806/q_image_thumb.png?1453379911)
Spinal trigeminal nucleus (CN V, VII. IX, X)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/806/a_image_thumb.png?1453379829)
What does the red line represent?
What nuclei are found lateral to the line? medial?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/808/q_image_thumb.png?1453379862)
The red line is the sulcus limitans
Lateral to the sulcus limitans are the sensory nuclei
Medial to the sulcus limitans are the motor nuclei
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/878/808/a_image_thumb.png?1453380171)
Identify the landmarks or structures of the Pons marked by the red and yellow stars
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/879/465/q_image_thumb.png?1453380391)
The red star is the basal portion of the pons
The yellow star is the Tegmental portion (ventral to the 4th ventricle)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/879/465/a_image_thumb.png?1453380405)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/880/090/q_image_thumb.png?1453381132)
Facial colliculus
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/880/090/a_image_thumb.png?1453381032)
What are the Major Longitudinal Regions of the Pons (“Bridge”)
Basal Pons (Basis Pontis)
and
Pontine Tegmentum
What are the major components of the Basal Pons (Basis Pontis)
- Corticospinal and corticobulbar tracts (descending)
- Pontine nuclei (cerebellar circuitry)
What are the major components of the Pontine Tegmentum
- Is separated from cerebellum via 4th Ventricle
- Cranial nerve nuclei
- Reticular formation
- Medial lemniscus (ascending pathway heading to VPL of thalamus)
- MLF (mostly ascending here; keeps dorsomedial position)
Whats unique about the Pons?
- Reticular formation in medulla and caudal pons involved in _____ and _____ functions.
- Large, lateral connections with cerebellum via superior and middle _____ _____
- Shares vestibular nuclei of CN VIII with medulla (at _____ junction)
- Nuclei of CN ___, ___, and ___
Whats unique about the Pons?
- Reticular formation in medulla and caudal pons involved in motor** and **autonomic functions (also sleep, wakefullness, conciousness).
- Large, lateral connections with cerebellum via superior and middle cerebellar peduncles (hence, “bridge”)
- Shares vestibular nuclei of CN VIII with medulla (at pontomedullary junction)
- Nuclei of CN VII, VI, V
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/881/210/q_image_thumb.png?1453382091)
Corticospinal and corticobulbar tracts
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/881/210/a_image_thumb.png?1453382043)
Identify the landmark or structure
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/881/226/q_image_thumb.png?1453382675)
Medial longitudinal fasciculus (MLF)
NOTE: medial longitudinal fasiculus, connects vestibular and cochlear nuclei to nearby nuclei controlling extraocular muscles (III, IV, VI)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/176/881/226/a_image_thumb.png?1453382153)