Chp 9

Question 1

Cerebrospinal fluid (CSF)

Answer 1

fluid that circulates in and around the brain and spinal cord

Question 2

Choroid plexus

Answer 2

vascular network in the brains ventricles that forms cerebrospinal fluid

Question 3

Corpus callosum

Answer 3

thick bundle of myelinated nerve cell fibers deep within the brain that carries nerve impulses from one cerebral hemisphere to the other

Question 4

Dienchephalon

Answer 4

Region the brain between the cerebral hemispheres and the midbrain;contains the thalamus, hypothalamus and the pituitary gland

Question 5

Gyrus

Answer 5

Raised area of the cerebral cortex

Question 6

Hippocampus

Answer 6

Sea horse shaped region of the limbic system that functions in learning and formation of long term memory

Question 7

Limbic System

Answer 7

Area between the brains cerebrum and diencephalon that is involved in emotional states, memory, and behavior

Question 8

Meninges

Answer 8

three layers of fibrous membranes that cover the brain and spinal cord

Question 9

Reticular formation

Answer 9

network in the limbic system that governs wakefulness and sleep

Question 10

Sulcus

Answer 10

shallow groove as between convolutions of the cerebral brain cortex

Question 11

Ventricle

Answer 11

Cavity or chamber. One of the heart’s 2 lower chambers. One of the brains chambers where CSF is produced

Question 12

Four main divisions of the brain

Answer 12

• Cerebrum
• The diencephalon
• The brain stem
• The cerebellum

Question 13

The Cerebrum

Answer 13

Location: Largest and most superior portion of the brain. Divided into two hemispheres, each subdivided into lobes
Function: Cortex (outerlayer) is site for conscious thought, memory, reasoning, perception, and abstract mental functions, all localized within specific lobes

Question 14

The Diencephalon

Answer 14

Location: Between the cerebrum and the brain stem. Contains the thalamus and hypothalamus
Function: Thalamus sorts and redirects sensory input. Hypothalamus maintains homeostasis, controls autonomic nervous system and pituitary gland

Question 15

The Brain Stem

Answer 15

Location: Anterior region to the cerebrum
Function: Connects cerebrum and diencephalon with spinal cord

Question 16

Midbrain ( part of the brain stem)

Answer 16

Location: Below the center of the cerebrum
Function: Has reflex centers concerned with vision and hearing. Connects cerebrum with lower portions of the brain

Question 17

Pons (part of the brain stem)

Answer 17

Location: Anterior to the cerebellum
Function: Connects cerebellum with other portions of the brain. Helps regulate respiration

Question 18

Medulla Oblongata

Answer 18

Location: Between the pons and the spinal cord
Function: Links the brain with the spinal cord. Has centers for control of vital functions, such as respiration and the heartbeat

Question 19

Cerebellum

Answer 19

Location: Below the posterior portion of the cerebellum. Divided into 2 hemispheres.
Function: Coordinates voluntary muscles. Maintains balance and muscle tone

Question 20

The three meninges

Answer 20

• Pia mater
• Arachnoid
• Dura mater

Question 21

Pia mater

Answer 21

Location: The innermost layer of the brain, is attached to the nervous tissue of the brain and spinal cord and follows all contours of these structures
-The pia is made up of delicate connective tissue. It holds blood vessels that supply that supply nutrients and oxygen to the brain and spinal cord

Question 22

Arachnoid

Answer 22

• Middle layer of the meninges
• Loosely attached to pia mater by weblike fibers, forming a space( the subarachnoid space) where CSF circulates
• Blood vessels pass through this space

Question 23

Dura mater

Answer 23

• The outermost
• thickest and the toughest
• in 2 layers, the outerlayer fused to cranial bones
• in some places these 2 layers separate to provide venous channels, called dural sinuses, for the drainage of blood coming out from brain capillaries

Question 24

Functions of CSF

Answer 24

• Support nervous tissue
• Cushion shocks that would otherwise hurt these delicate structures
• Carries nutrients to the cells
• Transports waste products from cells

Question 25

p180

Answer 25

Cerebrospinal Fluid ( read)

Question 26

Frontal Lobe

Answer 26

Location: Lies anterior to the central sulcus - Primary motor area: provides conscious control of skeletal muscles - Premotor Cortex: helps plan complex movements - Prefrontal cortex: memory, problem solving, and conscious though , motor speech area, Broca

Question 27

Parietal Lobe

Answer 27

Locations: Occupies the superior part of each hemisphere and lie posterior to the central sulcus Impulses from the skin: Touch, pain, temp

Question 28

Temporal Lobe

Answer 28

Location: lies inferior to the side lateral sulcus and folds under the hemisphere on each side -Auditory, speech

Question 29

Occiptal Lobe

Answer 29

Location: posterior to the parietal lobe and extends over cerebrum -visual

Question 30

Two divisions of the Diencephalon

Answer 30

- Thalamus- Sort out impulses and direct them to particular areas of the cerebral - Hypothalamus (p185)

Question 31

pg 185

Answer 31

The brain stem (read)

Question 32

pg 186

Answer 32

The cerebellum (read)

Question 33

Objective 9

Answer 33

p190 Table 9-2

Question 34

pg 188

Answer 34

Cranial Nerves (read)

Question 35

Decussate

Answer 35

cross or intersect to form an X

Question 36

Ganglia

Answer 36

The collection of nerve cell bodies located outside the central nervous