Ch 14 Brain Evolution

Question 1

Process of brain evolution events

Answer 1

Cephalization

Question 2

Cephalization definition

Answer 2

creation of the brain

Question 3

Rostral definition

Answer 3

toward the forehead

Question 4

Caudal definition

Answer 4

toward the spinal cord

Question 5

Longitudinal Fissure definition

Answer 5

deep groove that separates cerebral hemispheres

Question 6

Gyri definition

Answer 6

thick folds on brain surface

Question 7

Sulci definition

Answer 7

shallow grooves between gyri

Question 8

Corpus callosum definition

Answer 8

thick tracts at bottom of longitudinal fissure that connects hemispheres

Question 9

How does the brain develop?

Answer 9

• neural plate formation
• neural fold formation
• neural tube creation
• primary vesicle development
• secondary vesicle development

Question 10

Formation of the embryonic neural tube

Answer 10

• mesoderm thickens to form neural plate
• neural plate sinks to form neural fold
• neural fold turns into neural tube

Question 11

Three layers of tissue in the embryo

Answer 11

ectoderm (inner), mesoderm (middle), ectoderm (outer)

Question 12

Ectoderm definition

Answer 12

outer layer of tissue in the embryo

Question 13

What primary tissue layer does the nervous system develop from?

Answer 13

ectoderm

Question 14

Neural plate development

Answer 14

third week of development, mesoderm thickens to form neural plate

Question 15

Neural plate definition

Answer 15

precursor to the brain and spinal cord

Question 16

Neural fold development

Answer 16

neural plate sinks to form neural fold which is a hollow tube

Question 17

Neural fold definition

Answer 17

raised edges that form along the sides of the neural plate

Question 18

Prosencephalon definition

Answer 18

forebrain

Question 19

What does the prosencephalon form?

Answer 19

cerebrum and diencephalon

Question 20

Mesencephalon definition

Answer 20

midbrain

Question 21

What does the mesencephalon form?

Answer 21

midbrain

Question 22

Rhombencephalon definition

Answer 22

hindbrain

Question 23

What does the rhombencephalon form?

Answer 23

cerebellum, pons, medulla oblongata

Question 24

Vesicle definition

Answer 24

small, hollow, fluid-filled sac in the developing brain

Question 25

Ventricle definition

Answer 25

interconnected, fluid-filled cavities within the brain that contain cerebrospinal fluid