Task 4 - Techniques of scanning Flashcards

1
Q

Invasive

A

Procedure that enters body

  • > usually by cutting or puncturing skin
  • > interrupts normal bodily function
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Non-Invasive

A

No break in the skin is created

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Density reflects..

A

Reflects the structure of the brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Blood flow reflects..

A

reflects metabolism of brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Electromagnetic activity reflects..

A

the electrical activity of brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Computerized Axial Tomography (CAT)

A
  • noninvasive
  • examine brain structure through analysis of X-ray absorption
  • several positions around the head
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

advantages of CAT

3

A

-quick
-accommondates large patiens
-high spatial resolution
(LOWER THAN MRI)
-option 3D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

disadvantages of CAT

2

A
  • can damage DNA (bcs radiation)

- Medicore temporal Resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Positron Emission Tomography (PET)

A
  • examine brain function
  • info about blood flow and how our body’s using oxygen and sugar
  • patients get radioactive bla injected into carotid artery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Advantage of PET

3

A

-High spatial reso
-helps doc to test for disease, how well treatment are working
(Cancer, heart, brain)
-Alzheimer, Parkinsons, seizure, stroke tumors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Image explanation of PET

A

– Each scan is a horizontal section

  • during different cognitive or perceptual task
  • Areas of high activity are reds and yellows.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Disadvantage of PET

3

A

-low temporal resolution
(Lower than MRI but better than CT)
-Does not provide images of brain structure Resolved by combining PET with MRI
-body stays radioactive for a short time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Transcranial Magnetic Stimulation (TMS)

A
  • noninvasive
  • stimulation of cortex through application of strong magnetic fields
  • best scanning tech to treat depression
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Magnetic stimulation

A

created to induce small electric current (compared to EEG) in specific parts of the brain
-> without causing seizure or loss of consciousness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

pro TMS

A

-used to map behavior
-help with stroke rehabilitation
-parkinsoms
migraine, pain mamagement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

cons TMS

A

-Low spatial resolution
-middle temporal resolution
- discomfort during the procedure
might faint or have a seizure undergoing stimulation.
-confusion related to disruptions in cognition, hearing or vision

17
Q

Magnetoencephalography (MEG)

A
  • passive and noninvasive
  • Patiens wears helmet
  • measures the tiny magnetic fields produced by active neurons
  • identify regions that are active during a given task.
  • localizes seizures in surgical treatments of epilepsy
  • maps functional areas of brain (sensory motor, language, memo)
18
Q

Pro MEG

A

-exellent temporal reso (advantage over fMRI)
-3D
-MEG fields pass through the head without any distortion.
(Advantage over EEG).
-Direct measure of brain function.
(Advantage over fMRI (indirect))
-most advamced method

19
Q

Con MEG

A

lacks spatial resolutions

only magnetic signals near surface of brain can be recorded

20
Q

Magnetic Resonance Imaging (MRI)

A

noninvasive

  • uses magnetic energy to generate high-resolution images that reveal structural brain details
  • used to detect anomalies in brain and spinal cord
21
Q

pro MRI

A

-doesnt use radiation
-More detailed than CT scan->3D
High spatial resolution

22
Q

con MRI

A
  • difficult for ppl with metal in body
  • size limits
  • no temporal reso