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4.1 > A3 - Embryology (Mitchell) > Flashcards

A3 - Embryology (Mitchell) Flashcards

1
Q

Envelops CNS axon

A

Plasma membrane of oligodendrocyte

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2
Q

Rostral neuropore closes

A

Day 25

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3
Q

Folding begins here

A

6th somite

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4
Q

Flexure where brain meets spinal cord

A

Cervical flexure

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5
Q

Caudal 1/3 neural tube

A

Spinal cord

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7
Q

Gives rise to:

Thalami, etc.

A

Diencephalon

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8
Q

Gives rise to:

Lower part of 4th ventricle

A

Myelencephalon

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8
Q

Responsible for:
Consciousness

Sensorimotor transformation

Sensory integration

Planning

A

Telencephalon

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9
Q

Envelops peripheral axon

A

Cell body of neurolemma (schwann cell)

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10
Q

Embryonic cell layer continuous with early CNS

A

Surface ectoderm

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11
Q

Development of neural tube

A

4th week

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12
Q

Wrappings lose cytoplasm

A

Oligodendrocyte

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12
Q

Suci and gyri develop in the human brain at this age

A

9 months

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13
Q

Gives rise to:

Telencephalon

Diencephalon

A

Forebrain (Prosencephalon)

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14
Q

Gives rise to:

Lateral ventricles

A

Telencephalon

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14
Q

Major relay center for hearing and vision

A

Midbrain (Mesencephalon)

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15
Q

Flexure where the pons develops

A

Pontine flexure

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16
Q

Oligodendrocytes are derivatives of _________

A

Neuroepithelium

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16
Q

Gives rise to:

Aqueduct

A

Mesencephalon

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17
Q

Alar neurons migrate to marginal zone, responsible for:

A

Fine touch proprioception

  • Gracile & Cuneate nucleii
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18
Q

Cerebellum develops as an expansion of _____

A

alar plates

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20
Q

Cells that help absorb & produce CSF in central canal & ventricles

A

Ependymal cells

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21
Q

Produces CSF

A

Choroid plexus

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22
Q

Surrounds neuroectoderm

A

Mesenchyme

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23
Q

4th Somite

A

Spinal cord development

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23
Q

Membranous layer of CNS derived from neural crest

A

Arachnoid mater

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23
Q

Changes in reflexes in adolescents due to

A

Myelination

24
Q

Wrappings retain cytoplasm

A

Neurolemma (schwann cell)

24
Q

Portion of the pituitary gland that grows from the roof of the mouth

A

Anterior hypophysial diverticulum

25
Q

Gives rise to:

Medulla

A

Myelencephalon

26
Q

Neurolemma (schwann cells) derived from _________

A

Neural crest cells

28
Q

Layer that contains axons

A

Marginal layer

29
Q

Gives rise to:

Mesencephalon

A

Midbrain – actually is the mesencephalon

29
Q

In the rostral myelencaphalon, motor nucleii are located _____ while sensory nucleii are located _____

A

medially

laterally

30
Q

Gives rise to:

Pons

Cerebellum

A

Metencephalon

31
Q

Layer that contains neuronal bodies

A

Mantle layer

31
Q

Portion of the pituitary gland that is an outgrowth of the hypothalamus

A

Posterior neural hypophysial diverticulum

32
Q

Gives whitish appearance to white matter

A

Myelin sheath

34
Q

Myelination of CNS axons

A

Oligodendrocytes

35
Q

Transmits signal from sensory neuron axon to somatic motor neuron

A

Association neuron

36
Q

Can wrap up to 50 axons

A

Oligodendrocytes

37
Q

Layer that becomes gray matter

A

Mantle layer

38
Q

Gives rise to:

Upper part of 4th ventricle

A

Metencephalon

40
Q

Canal within the neural tube becomes

A

Central canal

41
Q

Gives rise to:

Cerebral hemispheres

A

Telecephalon

43
Q

Location of sensory neurons

A

Outside CNS - dorsal root ganglia

44
Q

Forms brain and spinal cord

A

Neural tube

45
Q

Integrates sensory input to fine tune motor output

A

Cerebellum

47
Q

Caudal neuropore closes

A

Day 27

49
Q

Motor or sensory fibers myelinated first?

A

Motor

50
Q

Myelination of peripheral axons

A

Neurolemma (schwann cells)

51
Q

Flexure between forebrain & midbrain

A

Midbrain flexure

52
Q

Cranial 2/3 neural tube

A

Brain

53
Q

Divides alar and basal plates

A

Sulcus limitans

54
Q

Relay station for sensory neurons

A

Alar plates

55
Q

Gives rise to:

Metencephalon

Myelencephalon

A

Hindbrain (Rhombencephalon)

56
Q

Cells that provide support throughout CNS

A

Glial cells

57
Q

Formed from ependymal cells and overlying pia

A

Choroid plexus

58
Q

Layer that becomes white matter

A

marginal layer

60
Q

Walls of neural tube become

A

Spinal cord

61
Q

Relay information to and from cerebral cortex

Regulates basic functions - sleep, thirs, alertness

A

Diencephalon

  • Thalamic structures
62
Q

Provides path for regeneration of peripheral nerves

A

Myelin sheath

63
Q

Sensory neurons are derived from _______

A

Neural crest cells

64
Q

Contains motor neurons

A

Basal plate

65
Q

Layer that lines the central canal

A

Ventricular (ependymal)

66
Q

Gives rise to:

3rd ventricle

A

Diencephalon

67
Q

Closure of neuropores drives _________

A

Vascularization of CNS

4.1 (14 decks)

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