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4.1 > A3 - Embryology (Mitchell) > Flashcards

A3 - Embryology (Mitchell) Flashcards

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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
4th Somite
Spinal cord development
23
Membranous layer of CNS derived from neural crest
Arachnoid mater
23
Changes in reflexes in adolescents due to
Myelination
24
Wrappings retain cytoplasm
Neurolemma (schwann cell)
24
Portion of the pituitary gland that grows from the roof of the mouth
Anterior hypophysial diverticulum
25
Gives rise to: Medulla
Myelencephalon
26
Neurolemma (schwann cells) derived from \_\_\_\_\_\_\_\_\_
Neural crest cells
28
Layer that contains axons
Marginal layer
29
Gives rise to: Mesencephalon
Midbrain -- actually is the mesencephalon
29
In the rostral myelencaphalon, motor nucleii are located _____ while sensory nucleii are located \_\_\_\_\_
medially laterally
30
Gives rise to: Pons Cerebellum
Metencephalon
31
Layer that contains neuronal bodies
Mantle layer
31
Portion of the pituitary gland that is an outgrowth of the hypothalamus
Posterior neural hypophysial diverticulum
32
Gives whitish appearance to white matter
Myelin sheath
34
Myelination of CNS axons
Oligodendrocytes
35
Transmits signal from sensory neuron axon to somatic motor neuron
Association neuron
36
Can wrap up to 50 axons
Oligodendrocytes
37
Layer that becomes gray matter
Mantle layer
38
Gives rise to: Upper part of 4th ventricle
Metencephalon
40
Canal within the neural tube becomes
Central canal
41
Gives rise to: Cerebral hemispheres
Telecephalon
43
Location of sensory neurons
Outside CNS - dorsal root ganglia
44
Forms brain and spinal cord
Neural tube
45
Integrates sensory input to fine tune motor output
Cerebellum
47
Caudal neuropore closes
Day 27
49
Motor or sensory fibers myelinated first?
Motor
50
Myelination of peripheral axons
Neurolemma (schwann cells)
51
Flexure between forebrain & midbrain
Midbrain flexure
52
Cranial 2/3 neural tube
Brain
53
Divides alar and basal plates
Sulcus limitans
54
Relay station for sensory neurons
Alar plates
55
Gives rise to: Metencephalon Myelencephalon
Hindbrain (Rhombencephalon)
56
Cells that provide support throughout CNS
Glial cells
57
Formed from ependymal cells and overlying pia
Choroid plexus
58
Layer that becomes white matter
marginal layer
60
Walls of neural tube become
Spinal cord
61
Relay information to and from cerebral cortex Regulates basic functions - sleep, thirs, alertness
Diencephalon - Thalamic structures
62
Provides path for regeneration of peripheral nerves
Myelin sheath
63
Sensory neurons are derived from \_\_\_\_\_\_\_
Neural crest cells
64
Contains motor neurons
Basal plate
65
Layer that lines the central canal
Ventricular (ependymal)
66
Gives rise to: 3rd ventricle
Diencephalon
67
Closure of neuropores drives \_\_\_\_\_\_\_\_\_
Vascularization of CNS

4.1 (14 decks)

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