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Anatomy > Created a better deck below with this material... > Flashcards

Created a better deck below with this material... Flashcards

1
Q

Meninges

A

Coverings of the Brain and Spinal Cord

Spinal and Cranial Meninges are continuous with each other

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2
Q

What do the meninges protect us from?c

A

Protect from Mechanical Injury

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3
Q

Cranial Meninges Layers

A

Pia Mater
Subarachnoid space-CSF (cerebral spinal fluid)
Arachnoid Mater
Subdural Space** (potential space - you can make it if you pull them apart)
Dura Mater

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4
Q

cranial epidural space

A

Potential Space in the Cranium
Viable space in the Vertebral
Column-Fat and Vertebral Venous Plexus

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5
Q

Tentorium Cerebelli

A

a sheet of duramater perpendicular to the cerebral falx that covers up the posterior cranial fossa and cerebellum (which is in the posterior cranial fossa)
-Tentorial Notch

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6
Q

Tentorial Notch

A

allows passage through for the brainstem

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7
Q

Falx Cerebri

A

separates the cerebral hemispheres
Attaches rostrally to the Crista Galli.
Lies within the Medial Longitudinal Fissure.

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8
Q

Two types of CNS Circulation

A

Extracranial Circulation

Intracranial Circulation

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9
Q

Extracranial Circulation

A

Anterior Circulation:
-Carotid Arterial System

Posterior Circulation:
-Vertebral Arterial System

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10
Q

Anterior and Posterior Circulation come together at

A

the Circle of Willis - its a fail safe system because if one side doesn’t work, hopefully the other side can cover

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11
Q

Anterior Circulation

A

Common Carotid Arteries
Internal Carotid Arteries
Anterior Circulation

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12
Q

Posterior Circulation

A

Vertebral Arteries

Posterior Circulation

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13
Q

Internal Carotid artery enters the skull through the

A

Carotid Canal

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14
Q

Vertebral arteries enter the skull through

A

Foramen Magnum

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15
Q

Arterial supply to the brain from

A

Circle of Willis branches

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16
Q

Blood is returned from the cranial cavity and brain via the

_____ _____ ____, which receive blood from the ___ ____ ___

A

dural venous sinuses

from the superficial cerebral veins

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17
Q

Posterior Cerebral Artery supplies

A
  1. Medial and Lateral Occipital Lobe (Note: Calcarine A. branch)
  2. Inferior Surface of temporal Lobe
18
Q

Calcarine A. branch

A

???

19
Q

Middle Cerebral Artery supplies

A

The lateral side of the Frontal, Parietal, Temporal Lobes

Most strokes occur at this artery.

20
Q

Anterior Cerebral Artery supplies

A

The Medial Side of Frontal and Parietal Lobes

21
Q

Posterior inferior cerebellar artery supplies

A

the lower inferior surface of the cerebellum and the lower brainstem

22
Q

Anterior inferior cerebellar artery supplies

A

the upper inferior surface of the cerebellum and the upper brainstem

23
Q

Superior cerebellar artery

A

supplies the superior surface of the cerebellum and midbrain

24
Q

Labyrinthine A’s supplies

A

the inner ear

25
Q

Pontine Arteries supply

A

the basis pontis (pons)

26
Q

note Superior Anastomotic v. & Superficial Middle Cerebral v.)

A

KNOW THESE !!!???

27
Q

Subdural hematoma

A

usually happen after trauma. Baby gets dropped on their head, or adult falls down (a lot of alcoholics). It is when you tear one of those superficial veins or sinus and you get a leak of blood. The blood gradually accumulates and clots in the subdural space

28
Q

Occipital Sinus

A

Venous Return from/ drains the Cerebellum and brainstem

29
Q

Confluence of Sinuses

A

where all the veins run together.

30
Q

Cerebrospinal fluid (CSF) is produced within spaces of the brain known as

A

ventricles

31
Q

How many ventricles

A

2 lateral ventricles, 3rd ventricle (between 2 thalamus lobes), 4th ventricle

32
Q

why do we have cerebral spinal fluid

A

nutrition - sugar, glucose and mechanical support

33
Q

Cerebral spinal fluid is produced by the

A

Choroid Plexus (found in each ventricle)- it iscapillaries covered by ependymal cells

34
Q

Cerebral Spinal Fluid is absorbed by

A

Arachnoid Villi

35
Q

Avg. Adult Volume of cerebral spinal fluid:

A

140 to 270ml

36
Q

As the CSF is produced within the lateral ventricles, it flows into the 3rd ventricle via the

A

interventricular foramina (Monro

37
Q

CSF continues from the 3rd ventricle to flow into the

A

cerebral aqueduct (Sylvius)

38
Q

cerebral aqueduct (Sylvius) takes cerebral spinal fluid to

A

the 4th ventricle

39
Q

After the 4th ventricle, CSF then flows into the subarachnoid space via small defects in the 4th ventricle: the:

A

Dorsomedian Aperture (foramen of Magendie) and the 2 foramina of Luschk (lateral foramina)

40
Q

CSF percolates around the CNS, and is eventually returned to the blood vascular system at the

A

superior sagittal sinus

Anatomy (23 decks)

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