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Chapter 3
neuro chapter 3
38
Anatomy
Graduate
09/23/2009

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Term
Meninges
Definition
3 layers of connective tissue that surrounds the brain and spinal cord
Term
3 layers of meninges
Definition

1.Dura mater

2.Aracnoid mater

3. Pis mater

Term
Dura mater
Definition

outermost layer of the meninges; tough; thick external fibrous layer

-falx cerebri & tentorium

Term
Arachnoid mater
Definition
thin intermediate layer arachnoid granulations (villa) allow CSF to flow into sinuses and back into the venous system
Term
Pia mater
Definition
delicate internal vascular layer; forms the choroid plexus of the ventricles
Term
Choroid plexus
Definition
the major site of cerebral spinal fluid formation
Term
Sub-arachnoid space
Definition
space between the pia & arachnoid mater that contians CSF, and acts like a shock absorbing cushion
Term
Epidural space
Definition
space between dora mater & bone
Term
Dural sac
Definition
contains the spinal cord
Term
Denticulate ligaments
Definition
series of fine triangular ligaments that allow the cord to attach to the dura
Term
Dorsal sensory root
Definition
spinal nerves that arise from a small bundle of dorsal filaments which unite
Term
Ventral motor root
Definition
bundle of ventral filaments
Term
Cauda Equina
Definition
belo the point in which the spinal cord is NO longer occupied by the cord but instead by a leash of vertically runnin lubar & sacral nerve roots
Term
Cranial meninges
Definition
coverings of the brain that lie immediately internal to the cranium. They protect the brain from the supporting framework for arteries, veins & verious sinuses & enclose the subarachnoid space
Term

Arachnoid villi

(granulations)

Definition
allow CSF to flow into sinuses & back into the venous system
Term
Cranial dura mater
Definition

adherent to internal surface of the cranium; a 2 layered membrane

1. external periosteal layer

2. internal neningeal layer

Term
Tentorium cerebelli
Definition
roof above cerebellum that holds up ocsepital lobes
Term
Falx cerebri
Definition
keeps cerebral hempispheres and cerebellum in place
Term
Brainstem
Definition
  • medulla
  • pons
  • midbrain
Term
Hindbrain
Definition
  • cerebellum
  • brainstem(medulla,pons, midbrain)

 

Term
Forebrain
Definition
  • diencephalon
  • cerebral hemispheres
Term
Cerebrum
Definition
formed by the right & left cerebral hempisheres; the largest portion of the brain
Term
Cerebrospinal fluid (CSF)
Definition
clear liquid; similar to blood; provides nutrients, but less protein & different ion concentration
Term

Interventricular

foramina

Definition
channels that connect the paired lateral ventricles ith the 3rd ventricle @ the midline of the brain
Term
locations of 4 ventricles
Definition

1. R cerebral hemisphere

2. L cerebral hemisphere

3. diencephalon

4.pons & upper medulla

Term
Internal veins
Definition
w/i the substance of the brain & external veins, that drain into a large venous sinuses, internal jugular veins
Term

Blood Brain Barrier

(BBB)

Definition
regulates & restricts movement of products w.i nervous system; prevents entry of patheogeons, certain meds& protein antibodies
Term
Blood Cerebrospinal fluid barrier
Definition
formed by the choroid plexus, epitelial cell & the arachoid membrane
Term
Arterial system
Definition
brings carbohydrates & oxygen needed for metabolism
Term
Circle of willis
Definition
the internal carotid arteries branch at the base of the brain associated w. branches that feed up the cerebral hemisphere.
Term

Anterior cerebral artery

(ACA)

Definition
anteriosuperior parts of the cerebrum
Term

Middle cerebral artery

(MCA)

Definition
lateral cerebral hemispheres
Term

Posterior cerebral arteries

(PCA)

Definition
occipital lobe, mid brain, parts of the temporal lobe
Term
Formine of Luschka
Definition
opening from 4th ventricle that allows CSF to go outside the spinal cord
Term
Basilar & Vertibral arteries are...
Definition
parts of the blood supply to the base of the brain that bring blood primaraly to the cerebellum are called...
Term
Vertebral Arteries
Definition
  • posterior/inferior cerebrllar arteries
  • spinal arteries anterior/posterior
Term
Basilar artery
Definition
anterior/inferior cerebella arteries & superior cerebellar arteries
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