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Neuroanatomy > Brainstem > Flashcards

Brainstem Flashcards

1
Q 
Nucleus Ambiguus 
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Medulla
CN : IX, X
Type: Special Visceral Efferent, Branchial Motor
Serves: IX- stylopharyngeus (BM)
X - muscles of the palate, pharynx, larynx (4th arch) BM

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2
Q 
Abducens Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Pons
CN : VI
Type: General Somatic Efferent
Serves: Lateral Rectus Muscle

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3
Q 
Hypoglossal Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Medulla
CN : XII
Type: General Somatic Efferent (somatic Motor)
Serves: Genioglossus, hyoglossus, styloglossus, and intrinsic muscles of the tongue

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4
Q 
Trigeminal Motor Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Pons
CN :V
Type: Special Visceral Efferent , Branchial Motor
Serves: Muscles of mastication (BM)
anterior digastric, mylohyoid, tensor typmani, tensor veli palatini muscles (Visceral Motor)

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5
Q 
Inferior Salivary Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Medulla
CN : IX
Type: General Visceral Efferent (Visceral Moto)
Serves: Parotid Gland

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6
Q 
Occulomotor Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Midbrain
CN : III
Type: General Somatic Efferent (somatic motor)
Serves: SR, IR, MR, IO, levator palpebrae superioris

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7
Q 
Dorsal Motor Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Medulla
CN : X
Type: General Visceral Efferent (Parasympathetic)
Serves: Thorasic and abdominal viscera

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8
Q 
Superior Salivatory Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A 
Origin: Pons
CN : VII
Type: General Visceral Efferent
(Visceral Motor - Parasympathetic)
Serves: lacrimal gland, submandibular and sublingual glands
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9
Q 
Edinger Westphal Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Midbrain
CN : General Visceral Efferent (Visceral Motor)
Type: III - Occulomotor
Serves: Pupillary Constrictors and Ciliary Muscles

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10
Q 
Trochlear Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Midbrain
CN : IV
Type: General Somatic Efferent
Serves: Superior Oblique Muscle

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11
Q 
Spinal Trigeminal Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin:Pons (Middle Cerebellar peduncle)
CN : V
Type: General Sensory Afferent (V1,2,3)
Serves: Sensory to the Head and Face

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12
Q 
Facial Nucleus
Origin in Brainstem?
Cranial Nerve?
Type of Nucleus
Serves what?
A

Origin: Pons
CN :VII
Type: Branchial Motor Nucleus
Serves: Muscles of facial expression

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13
Q

Gag reflex
sensory component? - nerve
motor component? - nerve and nucleus

A

sensory - CN IX - tough back of throat

Motor- CN X via Nucleus Ambiguus - pharyngeal and palatal muscles contract

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14
Q

What cranial nerves in Midbrain

A

III, IV

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15
Q

What cranial nerves in Medulla

A

IX,X,XI,XII

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16
Q

What cranial nerves in Pons

A

V,VI,VII,VIII

17
Q

how do you test the trochlear nerve?

What muscle does this test?

A

look medial and down to test the superior oblique

18
Q

What occurs if you damage the Edinger Westphal Nucleus?

A

Mydriasis - due to unopposed action of the dilator pupillae muscle - sympathetic - pupuls expand

19
Q

where does the eye go if the occulomotor neuron is dammaged?

A

lateral and inferior

20
Q

Motor nuclei are located lateral or medial to the sulcus limitans?

A

motor= medial to sulcus limitans

21
Q

where do we find the red nucleus?

A

only in the rostral midbrain

22
Q

where do we find branchial motor neurons?

A

only in the pons and medulla

23
Q

where are the hearing and balance nuclei found?

A

pons and medulla

24
Q

sensory nuclei are located lateral or medial to the sulcus limitals ?

A

sensory = lateral to sulcus limitans

25
Q

Corneal Reflex - touch the cornea
sensory?
Motor?
What occurs?

A

Sensory: CN V-1 to Spinal trigeminal nucleus
Motor: Facial Nucleus to temporal branch of CN VII.
-blink orbicularis occuli muscle

26
Q

Shine a light in left eye, which pupils contract and why?
What nerves are input and output?
What level of the brain does this test?

A
  • Both pupils contract.
  • CN II Optic Nerve provides the afferent senory input and CN III Oculomotor Nerve provides the efferent visceral motor via the Edinger Westphal Nucleus
  • Tests the Midbrain
27
Q

How to test the inferior rectus muscle?

What CN is this?

A

CN III

-To test - look lateral then down

Neuroanatomy (12 decks)

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