14.6 The Cerebrum

Question 1

This is the “seat of intelligence”

Answer 1

The cerebrum

Question 2

The cerebrum consists of:
1. An outer________ __________
2. An internal region of ______________ ___________ _____________
3. And ____________ __________ nuclei deep within the white matter

Answer 2

1. Cerebral Cortex
2. Cerebral white matter
3. gray matter

Question 3

This is the region of gray matter that forms the outer rim of the cerebrum

Answer 3

The cerebral cortex

Question 4

What are the folds called in the cerebral cortex?

These are caused by the grey matter growing more rapidly than the white matter in embryonic development

Answer 4

Gyri or convolutions

Question 5

How thick the cerebral cortex?

Answer 5

2-4 mm

Question 6

Deepest grooves of the cerebral cortex are called?

Answer 6

Fissures

Question 7

Shallower grooves of the cerebral cortex are called?

Answer 7

Sulci

Question 8

This is the most prominent fissure on the cerebral cortex, and it seperates the cerebrum into left and right halves?

Answer 8

The longitudinal fissure

Question 9

What are the right and left halves of the cerebrum that are divided by the longitudinal fissure, referred to as?

Answer 9

The right and left cerebral hemispheres

Question 10

This structure is a cresent shaped fold of the dura matter, within the the longitudinal fissure and between the cerebral hemishpheres and seperates them

Answer 10

The falx cerebri

Question 11

This structure is a broad band of white matter that contains axons that connects the two hemispheres of the cerebrum

Answer 11

The corpus collosum

Question 12

What are the lobes of the cerebrum named after?

Answer 12

The bones that cover them

Question 13

What are the four lobes found in each hemisphere?

Answer 13

1. Frontal lobes
2. Parietal lobes
3. Occipital Lobes
4. Temporal lobes

Question 14

What groove seperates the frontal and parietal lobes?

Answer 14

The central sulcus

Question 15

This major gyrus is located just anterior the central sulcus and contains the primary motor area of the cerebral cortex

Answer 15

The precentral gyrus

Question 16

This major gyrus is located just posterior to the central sulcus and contains the primary somatosensory area of the cerebral cortex

Answer 16

Postcentral gyrus

Question 17

This sulus seperates the frontal lobe from the temporal lobe

Answer 17

The lateral cerebral sulcus

Question 18

This sulcus seperates the parietal lobe from the occipital lobe

Answer 18

Parieto-occipital sulcus

Question 19

This is a fifth part of the cerebrum that is located within the lateral cerebral sulcus and is deep to the parietal, frontal and temporal lobes

Answer 19

The insula

Question 20

This consists primarily if myelinated axons in three types of tracts

Answer 20

Cerebral White Matter

Question 21

This cerebral white matter tract contains axons that conduct nerve impulses between gyri in the same hemisphere

Answer 21

Association Tracts

Question 22

This cerebral white matter tract see nerve impulses between gyri in one hemisphere and corresponding gyri in opposite hemisphere

Answer 22

Commissural Tracts

Question 23

What are the three important groups of commissural tracts in the cerebral white matter?

Answer 23

1. Anterior commissure
2. Posterior commissure
3. Corpus Collosum

Question 24

This is the largest nerve fiber bundle in the brain, containing about 300 million fibers

Answer 24

The corpus callosum

Question 25

This type of tract found in the cerebral white matter contains axons that conduct nerve impulses to or from the lower parts of the CNS

Answer 25

Projection tractsT

Question 26

This tract in the cerebral white matter is an example of a projection tract and is a thick band of white matter that contains both ascending and descending axons

Answer 26

internal capsule

Question 27

Three nuclei or masses of gray matter are found deep within each cerebral hemisphere and are called:

Answer 27

the basal nuclei

Question 28

One of Two of the basal nuclei that lie side by side, just lateral to the thalamus, this one is closest to the thalamus

Answer 28

The globus pallidus

Question 29

One of Two of the basal nuclei that lie side by side, just lateral to the thalamus, this one is closest to the cerebral cortex

Answer 29

The putamen

Question 30

The puntamen and globus pallidus are collectively known as:

Answer 30

The lentiform nucleus

Question 31

These two nuclei make up the lentiform nucleus

Answer 31

1. putamen (closer to cerebral cortex) 2. Globus pallidus

Question 32

THis is the third basal nuclei, it has a large head and smaller tail with a comma shaped body

Answer 32

Caudate nucleus

Question 33

The caudate nucleus, globus collosum, putamen are collectively known as

Answer 33

The corpus stratium

Question 34

This is a thin sheet of grey matter situated lateral to the putamen

Answer 34

The claustrum

Question 35

The basal nuclei receive input from

Answer 35

The cerebral cortex

Question 36

The basal nuclei provide output to:

Answer 36

the motor parts of the cortex

Question 37

These are the nuclei that the basal nuclei send output to the cortex via

Answer 37

The ventral and medial group nuclei of the thalamus

Question 38

This is a major function of the basal nuclei

Answer 38

Help regulate initiation and termination of movements

Question 39

The basal nuceli also control subconscious....

Answer 39

contraction of skeletal muscles