Exam 3 slides 1

Question 1

Laterized

Answer 1

-One hemisphere is more involved
-Language is laterized

Question 2

Epilepsy

Answer 2

-Characterized by seizures
-“Cluster” of disorders
-When severe requires surgery

Question 3

Seizures

Answer 3

-Excessive or synchronous brain activity

Question 4

Grand mal seizures

Answer 4

-Most severe
-Generalized tonic clonic seizures

Question 5

Generalized and tonic clonic meaning

Answer 5

Generalized: Seizure spreads to both hemispheres, loss of consciousness
Tonic Clonic: Involves muscle contractions

Question 6

Electricorticography

Answer 6

-Determines seizure origin

Question 7

Wada test

Answer 7

1. inject a sedative into one of the arteries
2. Have a patient speak continuously
3. This gradually moves into the hemisphere on that side
4. As it reaches the hemisphere, is their speech impaired?
5. If so, don’t do surgery on that side

Question 8

Brocas aphasia

Answer 8

-“Non fluent”, unable to produce speech
-Can comprehend language fine

Question 9

Wernickes aphasia

Answer 9

-“Fluent”, able to produce speech
-Speech makes little sense, cant comprehend language

Question 10

Focal resection

Answer 10

-If seizures have a clear origin or “seizure focus” it can be removed
-These patients are often studied with the lesion method

Question 11

Corpus Callosotomy

Answer 11

-Cutting the corpus callosum (nerve fibers that connect the right and left hemisphere

Question 12

Split brain patients

Answer 12

-Have undergone a corpus callosotomy
-Appear fine, need to probe more carefully to detect deficits

Question 13

Split brain experiment-oddities

Answer 13

-Asked patient to look at objects selected from both hands
-Left hemisphere will make up a story to explain what the other hand grabbed
-Possible psychological defense mechanism

Question 14

Left vs right brain functions

Answer 14

Left: Analytic thought, Logic, Language, Science and math

Right: Holistic thought, Intuition, Creativity, Art and music

Question 15

Neural correlates of consciousness NCC

Answer 15

-What is the basis of consciousness?
-Most unknown question in neuroscience
-Connectivity

Question 16

Neuropil

Answer 16

All of the tissue of the brain

Question 17

Local connectivity

Answer 17

-The brain is constantly active
-Electromagnetic fields always flowing through neuropil

Question 18

Local field potentials LFP

Answer 18

-Name for the electromagnetic fields
-Flow through the brain and affect neurons

Question 19

Ephaptic coupling

Answer 19

When LFPs influence neurons

Question 20

Neurodynamics

Answer 20

Study of brain interactions