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Veterinary Anatomy III > THRC.3 > Flashcards

THRC.3 Flashcards

1
Q

What is contained in the rhomboencephalon?

A
  • Myelencephalon
    • Medulla oblongata
  • Metencephalon
    • Pons
    • Cerebellum
    • Medullary vela
    • Rhomboid fossa
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2
Q

Myelencephalon composition

A
  • Medulla oblongata
  • Fourth ventricle of the brain
  • Caudal medullary velum
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3
Q
A

Medulla oblongata

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4
Q
A

Metencephalon

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5
Q
A

Myelencephalon

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6
Q

Give the arrangement of nuclei in medulla oblongata

A
  • Sensory nuclei are more lateral
  • Motor nuclei are more medial
  • Parasympathetic nucle between sensory and motor nuclei
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7
Q

Where is medulla oblongata located?

A
  • In fossa medullae oblongata
  • Dorsal to basiocciput
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8
Q

The ventral surface of medulla oblongata is divided by…

A

Ventral median fissure

(continuous from the spinal cord)

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9
Q
A

Medulla oblongata

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10
Q

Fibres cross the midline to form the…

A

Pyramidal decussation

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11
Q
A

Pyramids of vermis

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12
Q

What is represented by the blue crosses?

A

Decussatio pyramidium

  • At the spinomedullary junction*
  • Accounts for movements on one side of the body are controlled by the opposite side of the brain*
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13
Q
A

Pyramids of vermis

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14
Q
A

Trapezoid body

Belongs to the pons

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15
Q
A

Ventral median fissure

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16
Q
A

Decussatio pyramidium

  • At the* spinomedullary junction
  • Accounts for movements on one side of the body are controlled by the opposite side of the brain*
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17
Q
A

CN-VI Abducent nerve

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18
Q
A

CN-VII Facial nerve

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19
Q
A

CN-VIII Vestibulocochlear nerve

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20
Q
A

CN-IX Glossopharyngeal nerve

21
Q
A

CN-X Vagus nerve

22
Q
A

CN-XI Accessory nerve

Recieves additional spinal root from the spinal cord

23
Q
A

CN-XII Hypoglossal nerve

24
Q

13

A

Location of Olivary nucleus

25
Q

Function of the olivary nucleus

A

Control of body motor function

26
Q

Function of the medulla oblongata

A

Respiration and circulation control

27
Q

Composition of the metecephalon

A
  • Pons
  • Cerebellum
  • Medullary vela
  • Rhomboid fossa
28
Q
A

Pons

29
Q
A

Cerebellum

30
Q

The dorsal part of the pons

A

Tegmentum of the pons

31
Q
A

CN-V Trigeminal nerve

32
Q

Location of the motor nucleus of CN-V

A

Inside the pons

33
Q

Location of the cerebellum

A

Dorsal to the fourth ventricle

34
Q

Structure of the cerebellum

A

Fissures > Lobes > Small lobules > Folia

Forms the ‘tree of life’

35
Q

The grey matter of the cerebellum

A

Cortex cerebelli

36
Q

White matter of the cerebellum

A

Medulla

37
Q

Grey matter in the medulla forms…

A

Basal nuclei

38
Q

What attaches the cerebellum to the brainstem?

A

6 peduncles: 3 on each side

  • Rostral cerebellar peduncle
  • Caudal cerebellar peduncle
  • Middle cerebellar peduncle
39
Q

Insertion of the rostral cerebellar peduncle

A

Rostral medullary velum

40
Q

Insertion of the caudal cerebellar peduncle

A
  • Caudal medullary velum
  • Medulla oblongata
41
Q

Insertion of the middle cerebellar peduncle

A

Pons

42
Q

Function of the cerebellum

A
  • Balance
  • Co-ordination of skeletal muscles
43
Q
A

Rostral medullary velum

44
Q

Location of the medullary velae

A

Between the:

  • Rhomboid fossa (floor)
  • Cerebellum
45
Q

Structure of the medullary velae

A
  • Tent shape forms
  • For the roof over the fourth ventricle
46
Q

Give the sulcuses of the fossa rhomboidea

What is between them

A
  • Sulcus medianus
  • Sulcus limitans x 2

Eminentia medialis is found between them

47
Q

The walls of the rhomboid fossa are marked by…

A

Area vestibularis/acustica

(Bilateral eminence)

48
Q

Obex

A

The caudal end of the sulcus medianus in fossa rhomboideus

49
Q

Which cranial nerve nuclei are found in eminentia medialis?

A
  • IX
  • X
  • XII

Veterinary Anatomy III (124 decks)

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