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Anatomy of Dentistry Semester 2 > Lobes, Sulci & Gyri of the brain > Flashcards

Lobes, Sulci & Gyri of the brain Flashcards

1
Q

What does the Parietooccipital sulcus separate?

A

Parietal lobe from the Occipital lobe

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2
Q

What is the central sulcus located?

A

Between the Frontal lobe and the parietal lobe & motor cortex from the somatosensory cortex

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3
Q

Where is the cerebral cortex located?

A

Outer part of cerebral hemisphere

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4
Q

What is the cerebral cortex made up of?

A

Grey matter, which consists largely of the nerve cell bodies

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5
Q

What is the brainstem made up of?

A

Midbrain, Pons & Medulla oblongata

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6
Q

What are the 3 main divisions of the brain?

A

Forebrain, Midbrain & Hindbrain

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7
Q

What is contained within the forebrain?

A

Hypothalamus, Thalamus and Cerebral Hemispheres

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8
Q

What is contained within the hindbrain?

A

Pons, Medulla Oblongata and Cerebellum

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9
Q

Where does the medulla oblongata exit the skull from?

A

The foramen magma

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10
Q

What is the largest foramen in the base of the skull?

A

Foramen Magma

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11
Q

What runs between the two cerebral hemispheres?

A

Longitudinal Fissure

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12
Q

Name the 4 lobes found in each cerebral hemisphere

A

Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe

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13
Q

What does the anterior cerebral artery supply?

A

The medial surface till the parietooccipital sulcus and supply a strip one inch wide on the lateral surface

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14
Q

State the arterial supply of the medial surface

A

Anterior & Posterior cerebral artery

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15
Q

What does the Middle cerebral artery supply?

A

The lateral surface except for a narrow strip supplied by ant cerebral artery up and posterior cerebral artery down

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16
Q

What is the arterial supply of the lateral surface?

A

Middle, Interior & Posterior cerebral arteries

17
Q

What does the Posterior cerebral artery supply?

A

Occipital pole & Inferior surface on both the medial and lateral sides

18
Q

What is the arterial supply of the tip of the temporal lobe?

A

Branch of the middle cerebral artery

19
Q

List the main sulci of the super-lateral surface

A 
Post Central
Intraparietal
Sup. Temporal
Inferior Temporal
Inferior Forntal
Superior Frontal
Precentral
20
Q

How many main sulcus does the frontal lobe have?

A

2

21
Q

Where is the central sulcus located?

A

Between the frontal and parietal lobes

22
Q

What occupies the post-central gyrus?

A

Primary sensory cortex

23
Q

What occupies the pre-central gyrus?

A

Primary Motor Cortex

24
Q

What would happen if there was a thrombus on the right side of the brain?

A

Patient will have lack of movement on the left side

25
Q

Where does most crossing over happen in the brain?

A

At the medulla oblongata before leaving the foramen magna

26
Q

What separates the Lingual gyrus?

A

Calcarine sulcus

27
Q

What is the corpus callosum?

A

Band of nerve fibers that connects the two cerebral hemispheres

28
Q

What is the role of the corpus callousum?

A

Allows different parts of the cerebrum to communicate with each other

29
Q

What separates the medial surface from the opposite side?

A

Great longitudinal fissure and the falx cerebri

30
Q

What is white matter made up of?

A

Largely of axons forming tracts or pathways

31
Q

List the three types of white matter?

A

Association fibers
Commissural fibers
Projection fibers

32
Q

Whats the role of association fibres?

A

Interconnect the cortical areas of the same cerebral hemisphere (connecting areas on the same side)

33
Q

Give an example of association fibres

A

Superior longitudinal fasciculus connecting the front and the back of cerebrum

34
Q

Whats the role of commissural fibres?

A

Interconnect the corresponding cortical areas of the two cerebral hemispheres (cross midline)

35
Q

Give examples of commissural fibres

A

The fornix connects the cortex of the hippocampus in each hemisphere.
The corpus callosum the largest commissure. Its first fibers connect the frontal and parietal lobes of both sides

36
Q

Whats the role of projection fibres?

A

The fibers that descend or ascend between the cerebral cortex and the lower centers in the brain stem and spinal cord (connect brain-spinal cord)

37
Q

Give examples of projection fibres

A

Corona radiata which connects the cortex above with the thalamus, pons, medulla, and spinal cord

Anatomy of Dentistry Semester 2 (7 decks)

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