Exam 4

Question 1

Interneurons

Answer 1

• mostly numerous

- activated when neurons need to communicate with each other

Question 2

Motor neurons

Answer 2

• efferent

- activated when signal sent to muscles to contract

Question 3

Sensory neurons

Answer 3

• afferent

- activated by sensory input from sensorireceptors

Question 4

Unipolar neuron

Answer 4

Mostly afferent

Question 5

Multipolar neuron

Answer 5

Mostly efferent or Purinje cell

Question 6

Activation of neuron: excitation

Answer 6

Increasing activity associated with neuron

Question 7

Activation of neuron: inhibition

Answer 7

Attenuate activity

Question 8

What is the brain covered in?

Answer 8

Meninges layers

Question 9

What are the 3 meningeal layers?

Answer 9

• dura mater(epidural and subdural space)
• arachnoid mater(subarachnoid space)
• pia mater(perforated)

Question 10

Layers that separate hemispheres

Answer 10

Falx cerebri

Question 11

Layers that separate cerebellar hemispheres

Answer 11

Falx cerebelli

Question 12

Layers that separate cerebrum from cerebellum

Answer 12

Tentorium cerebelli

Question 13

Where is the CSF produced in?

Answer 13

Choroid plexus

Question 14

How much CSF flow is produced and absorbed in the bloodstream? Time and amount

Answer 14

125mL produced in about 7 hours

Question 15

Parahippocampal gyrus

Answer 15

Memory

Question 16

Uncus

Answer 16

Smell

Question 17

Fusiform gyrus

Answer 17

Fusiform face area

Question 18

Where is CSF absorbed into the bloodstream?

Answer 18

Arachnoid villa

Question 19

What are the three fiber tracts?

Answer 19

Projection fibers
Commissural fibers
Association fibers

Question 20

Tract that carry from one level of CNS to another?

Answer 20

Projection fibers

• corona radiata
• internal capsule

Question 21

Tract that carry info between cortical hemispheres

Answer 21

Commissural fibers

• corpus callosum
• anterior commissure

Question 22

Tract that connects cortical areas within the same hemisphere

Answer 22

Association fibers

• short association fibers
• long association fibers

Question 23

Which nuclei group in the basal ganglia are putamen and caudate in?

Answer 23

Striatum

Question 24

Which nuclei group in the basal ganglia are putamen and globus pallidus in?

Answer 24

Lentiform nucleus

Question 25

Which section of the brain communicates with cortex and thalamus to modulate movement and regulate tone? Also has extra pyramidal system

Answer 25

Basal ganglia

Question 26

Basal ganglia: subthalamus

Answer 26

Input from motor cortex and basal ganglia; posture and tone

-damage may result in ballismus

Question 27

Basal ganglia: substantia nigra

Answer 27

Dopamine production

-Parkinson’s disease damages it

Question 28

Which system of the brain has to do with memory, emotion, and internal drive?

Answer 28

Limbic system

Question 29

Thalamus: Pulvinar

Answer 29

Input for language processing

Question 30

Thalamus: lateral geniculate

Answer 30

Input for vision

Question 31

Thalamus: medial geniculate

Answer 31

Input for auditory input

Question 32

What are the three peduncles? Efferent/afferent?

Answer 32

• inferior(a)
• middle(a)
• superior(e)

Question 33

Which part of the brain helps maintain balance and coordinates muscle action?

Answer 33

Cerebellum

Question 34

Where are cerebral peduncles found?

Answer 34

Midbrain

Question 35

Where are cerebellar peduncles found?

Answer 35

Pons