Exam #3: lab VI Flashcards Preview

Neuroanatomy > Exam #3: lab VI > Flashcards

Flashcards in Exam #3: lab VI Deck (50):
1

What is the mnemonic to remember the function of the cranial nerves?

"Some Say Money Matters But My Brother Says Big Brains Matter More"

I= Some, Sensory
II= Say, Sensory
III= Money, Motor
IV= Matters, Motor
V= But, BOTH
VI= My, Motor
VII= Brother, BOTH
VIII= Says, Sensory
IX= Big, BOTH
X= Brains, BOTH
XI= Matter, Motor
XII= More, Motor

2

What is the "rule of four?"

12 Cranial Nerves w/ 3x parts of the midbrain that they come off of:
1) Midbrain= III & IV
2) Pons= V, VI, VII, VIII
3) Medulla= IX, X, XI, XII

CN I & II are tracts of the brain and do NOT come off the brainstem

3

Where are the pure motor nuclei located? Where are the pure sensory nuclei located? Both?

Motor= medial
Sensory= lateral
Both= intermediate

4

Which retinal fields cross at the optic chiasma?

Temporal visual fields cross at the optic chiasm

*****Note that this is different from the RETINA
- Temporal part of the retina does NOT cross, but carries nasal visual fields
- Nasal part of the retina DOES cross, but carries temporal visual fields

5

Where does the optic tract synapse?

Lateral geniculate nucleus of the thalamus

6

Where does CN III emerge from the brain?

Interpeduncular fossa

7

What foramen does CN III traverse?

Superior orbital fissure

8

What is the only CN to cross in the brain?

CN IV

9

What part of the brainstem is the MCP associated with?

Pons

10

What foramen do the divisions of CN V traverse?

Ophthalmic= superior orbital fissure

Maxillary= foramen rotundum

Mandibular= foramen ovale

11

Where do CN VII & VIII travel to exit the skull?

Internal acoustic meatus of the petrous portion of the temporal bone

12

What is the landmark for differentiating between CN IX, X, & XI and XII?

Olive

13

Where does CN XII exit the brain?

Hypoglossal canal

14

What are the two CN nuclei that are located in the spinal cord?

CN V
CN XI

15

Where is the nucleus of CN XI located in cross-section?

Upper cervical cord, lateral to the ventral horn

16

Where nucleus of CN V is located in the cervical spinal cord?

Spinal nucleus of V

*****Takes over the region of the substantia gelatinosa

17

What order neuron is the spinal nucleus of CN V?

2nd

18

What axons synapse with the spinal nucleus of CN V?

Spinal tract of V

19

What sensations are being carried by the spinal tracts of CN V?

Pain
Temperature

20

What are the hallmarks for the caudal medulla?

Olive
Pyramids

21

Where is the Solitary Nucleus located?

Medulla (intermediate zone)

22

What is the function of the Solitary Tract?

Taste from the CN in the medulla i.e.
- IX (posterior 1/3 of the tongue)
- X (pharynx)

23

What CN are associated with the Nucleus Ambiguus?

CN IX
CN X

*****This is a motor nucleus that is associated with the muscles of the palate and the larynx

24

What is the one muscle the CN IX innervates?

Stylopharyngeus muscle

25

What are motor CNs considered?

LMN

26

What muscles are innervated by the hypoglossal nerve?

All of the muscles of the tongue except for the palatopharyngeus m that is innervated by CN X

27

What cell bodies are housed by the dorsal vagal nucleus?

Pre-synaptic PNS of the vagus nerve (CN X)

28

What are the hallmarks of the rostral medulla?

Pyramids
Olive
Open 4th ventricle
ICP

29

What is the MLF? What is the function of the MLF?

Medial Longitudinal Fasiculus; connect CN nuclei (CN III, IV, VI, & VIII)

*****Plays and important role in reflex movements of the head and neck/ balance

30

What is the arterial supply to the medial lemniscus of the medulla?

Penetrating branches from the anterior spinal arteries

31

What ganglia is the inferior salivatory nucleus associated with? What is the function?

Otic ganglia
- CN IX
- Parotid gland

32

What are the hallmarks for the caudal pons?

Basis pontis
Open 4th ventricle

33

What is the superior salivatory nucleus associated with?

CN VII

- Submandibular ganglia
- Ptergyopalantine ganglia

34

What are the three parts of the trigeminal nuclear complex? What are the functions associated with these three parts?

- Mesencephalic= proprioception
- Principal sensor= discriminative touch
- Motor nucleus= motor to muscles of mastication

35

What is the hallmark for the caudal midbrain?

Decussation of the SCP

36

What are the two unique features of the trochlear nerve?

1) Crosses in the brain
2) Emerges from the dorsal side of the brain

37

What is the hallmark of the rostral midbrain?

Red nucleus

38

What CN is associated with being able to see the Red Nucleus?

CN III

39

What function is associated with the Edinger Westphal nucleus?

PNS of CN III

40

What is the function of the posterior commissure?

Connects the temporal lobes

41

What are the structures that border the posterior commissure?

Superior colliculus
Cerebral aqueduct

42

What is the lamina terminalis?

Anterior most portion of the hypothalamus?

43

What is the dominant hemisphere for language?

Left (think L_eft= L_angugage)

44

What are the two gyri located in Broca's area?

Opercular
Triangular

45

What are the two gyri located in Wernicke's area?

Supremarginal
Angular

46

What are the three gyri located in the temporal lobe?

Superior
Middle
Inferior

47

What is the gyrus located in the lateral fissure? What is its function?

Transverse Gyrus of Heschl i.e. Primary Auditory Cortex

48

What part of the cortex is associated with the calcarine fissure?

Primary visual cortex

49

What is the superior gyrus that forms the primary visual cortex?

Cuneus Gyrus

50

What is the inferior gyrus that forms the primary visual cortex?

Lingual Gyrus