Week 2: Understanding brain structure through development Flashcards by Courtney Riches

What does the neural tube and neural crests form from?

The embryonic ectoderm

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List the three primary vesicles of the brain.

Prosencephalon, mesencephalon and rhombencephalon

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What are the special features of the human brain, compared to the rat brain?

Many similarities between
rat and human brain.

Some differences:
Rat cerebrum lacks convolutions of human brain (due to enormous expansion of cerebral cortex)
-Note relatively large olfactory bulb in rat
-Human brain has well developed temporal lobe

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Hydrocephalus is caused by … ?

a. The faulty closure of the neural tube
b. The obstruction of cerebrospinal fluid
c. Ruptures in the neural tube
d. Discharge of synaptic transmitters into blood

b. The obstruction of cerebrospinal fluid

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Which of the following means nose/front?

a. Coronal
b. Caudal
c. Dorsal
d. Rostral
e. Ventral
f. Medial
g. Distal
h. Lateral

d. Rostral

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List the secondary vesicles of the forebrain

five secondary brain vesicles: Telencephalon, Diencephalon, Mesencephalon, Metencephalon, and Myelencephalon.

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Which of the following is NOT true regarding the somatic PNS?

a. innervates skin, joints, muscles
b. It controls voluntary movement
c. It has two divisions: sympathetic and parasympathetic
d. It conducts impulses from the CNS to effectors

c. It has two divisions: sympathetic and parasympathetic

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State the main structural features of cortical tissue.

Common features of cerebral cortex in vertebrates
– Cell bodies in layers or sheets
– Surface layer separated from pia mater, layer I
– Apical dendrites form multiple branches

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What are afferent axons?

Afferent (“carry to”): carry information toward a

particular point

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List the three membranes
that surround the
brain

• Dura mater
• Arachnoid
membrane
• Pia mater

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Which of the following means posterior at the level of the head?

a. Coronal
b. Caudal
c. Dorsal
d. Rostral
e. Ventral
f. Medial
g. Distal
h. Lateral

b. Caudal

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The thalamus and hypothalamus are called…?

a. The mesencephalon
b. The telencephalon
c. The diencephalon
d. The hindbrain

c. The diencephalon

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The hippocampus, olfactory cortex and neocortex are all…?

a. Types of cerebral cortex
b. Diencephalon structures
c. Two cell layers thick

a. Types of cerebral cortex

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Which of the following is NOT true regarding the autonomic PNS?

a. innervates organs, blood vessels, glands
b. It’s voluntary
c. It has two divisions: sympathetic and parasympathetic
d. It conducts impulses from the CNS to effectors

b. It’s voluntary

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Which of the following processes visual and auditory data; generates reflexive somatic motor responses; maintains consciousness?

a. Diencephalon
b. Mesencephalon
c. Pons
d. Medulla Oblongata
e. Cerebellum
f. Cerebrum
g. Thalamus
h. Hypothalamus

b. Mesencephalon

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The thalamus and hypothalamus are called…?

a. The mesencephalon
b. The telencephalon
c. The diencephalon
d. The hindbrain

c. The diencephalon

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The prosencephalon, mesencephalon and rhombencephalon are?

a. The ventricles
b. Primary vesicles
c. Secondary vesicles
d. The forebrain

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b. Primary vesicles

What are efferent neurons?

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Efferent (“carry from”): carry information away from a

point

Which of the following coordinates complex somatic motor patterns; and adjusts output of other somatic motor centers in the brain and spinal cord?

a. Diencephalon
b. Mesencephalon
c. Pons
d. Medulla Oblongata
e. Cerebellum
f. Cerebrum
g. Thalamus
h. Hypothalamus

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e. Cerebellum

The prosencephalon is the…

a. Forebrain
b. Midbrain
c. Hindbrain

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a. Forebrain

The neural tube develops from…

a. Endoderm
b. Mesoderm
c. Ectoderm

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c. Ectoderm

Which of the following relays sensory information to thalamus and other portions of the brain stem; and has autonomic centers for regulation of visceral functions (cardiovascular, respiratory, digestive)?

a. Diencephalon
b. Mesencephalon
c. Pons
d. Medulla Oblongata
e. Cerebellum
f. Cerebrum
g. Thalamus
h. Hypothalamus

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d. Medulla Oblongata

a. Diencephalon
b. Mesencephalon
c. Pons
d. Medulla Oblongata
e. Cerebellum
f. Cerebrum
g. Thalamus
h. Hypothalamus

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d. Medulla Oblongata

Three weeks from conception:

a. Neural groove forms
b. Neural folds form
c. Neural folds fuse to form neural tube (neurulation)
d. the brain consists of a single flat sheet of ectoderm - the neural plate

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d. the brain consists of a single flat sheet of ectoderm - the neural plate

The meninges are: a. cerebrospinal fluid (CSF)-filled caverns and canals inside brain b. specialized tissue in ventricles that secretes CSF c. Three membranes that surround the brain d. attached to the brain stem

c. Three membranes that surround the brain

All mammalian brains have which four components in common?

1. Cerebrum 2. Diecephalon 3. Cerebellum 4. Brainstem

Arrange the following events in order: a. Neural fold forms b. Neural groove forms c. Neural folds fuse to form neural tube (neurulation) d. the brain consists of a single flat sheet of ectoderm - the neural plate

d. the brain consists of a single flat sheet of ectoderm - the neural plate b. Neural groove forms a. Neural folds form c. Neural folds fuse to form neural tube (neurulation)

The telencephalic vesicles, diencephalon and optic vesicles differentiate from: a. Forebrain b. Midbrain c. Hindbrain

a. Forebrain

Optic nerves form from: a. Optic cups b. Optic stalks c. The diencephalon d. The telencephalic vesicles e. The retinas

b. Optic stalks

Complete the following: The two cerebral hemispheres - develop in 4 ways: 1. Grow _______ to overlie _________ 2. Olfactory bulbs and other structures related to sense of smell sprout from ________ _______ 3. Cells of ________ walls divide and form various structures 4. White matter systems develop carrying ____ to and from neurons of ________

1. Grow posteriorly to overlie diencephalon 2. Olfactory bulbs and other structures related to sense of smell sprout from ventral surface 3. Cells of telencephalon walls divide and form various structures 4. White matter systems develop carrying axons to and from neurons of diencephalon (to allow communication between the telencephalon and diencephalon)

What are the white matter structures that differentiate from the telencephalon and diencephalon?

Corpus callosum Cortical white matter Internal capsule

Which of the following is true regarding the superior colliculus? a. It is contained in the tegmentum b. It has direct input from eye - controls reflex eye movements c. It is a relay station for auditory information d. It forms from the rhombencephalon

b. It has direct input from eye - controls reflex eye movements (TRUE) Corrections: The SC a. It is contained in the TECTUM c. The SC does eyes; it is the INFERIOR COLLICULUS that relays auditory information d. It forms from the MESENCEPHALON (midbrain)

Which two structures does the metencephalon form? a. medulla oblongata and cerebellum b. medulla oblongata and the 4th ventricle c. pons and 4th ventricle d. pons and cerebellum

Anterior portion of hindbrain (METENCEPHALON) forms PONS and CEREBELLUM Medulla oblongata and the 4th ventricle are formed by the Posterior portion of hindbrain (MYELENCEPHALON)

Which of the following is NOT true regarding the retinas? a. They form from optic cups b. They form from mesencephalon c. They form from optic vesicles d. They form from prosencephalon e. They are part of the CNS developmentally

b. They form from mesencephalon

Cerebral hemispheres lie above and on either side of the __________.

diencephalon

What the grey matter structures which differentiate from the telencephalon and diencephalon?

Cerebral cortex Thalamus Hypothalamus Basal telencephalon

Cortical white matter are tracts which communicate: a. Within hemispheres b. Between hemispheres c. With the spinal cord (projection tracts)

a. Within hemispheres

Which of the following form from the prosencephalon? (Select all that apply) a. Basal ganglia b. Thalamus c. Tegmentum d. Fourth ventricle e. Cerebral aqueduct f. Third ventricle

a. Basal ganglia b. Thalamus f. Third ventricle

The tectum, tegmentum and cerebral aqueduct all derive from: a. prosencephalon b. mesencephalon c. rhombencephalon

b. mesencephalon (the midbrain)

List the major structural features of the CNS of all mammals (from rostral to caudal).

Telencephalon, diencephalon, mesencephalon, rhombencephalon, spinal cord

The tegmentum contains which of the following (select all that apply): a. superior colliculus b. substantia nigra c. red nucleus d. inferior colliculus

b. substantia nigra c. red nucleus These are both motor centres a and d are in the Tectum

Which of the following are projection tracts (leave the cortex)? a. Corpus callosum b. Cortical white matter c. Internal capsule

c. Internal capsule

Week 2: Understanding brain structure through development Flashcards

(42 cards)