Draw Language Center Of The Brain Flashcards
Where is language produced in the brain?
Left hemisphere
What are the two important regions of the left hemisphere ?
Broca and wernicke’s areas
Where is Broca’s area located
Prefrontal cortex
What is Broca’s area associated with?
Production of expressive language spoken and written
Broca aphasia
Lesions in this area due to stroke result in difficulty producing fluent speech although the ability to understand spoken and written language is largely retained
Pet scan
Functional imaging technique that measures the emission of positrons that result from the metabolism of radioactive tracer
When is radioactive tracer injected
Prior to the scan
How to measure brain activity
A radiolabeled form of glucose is used as the tracer
How is glucose metabolized in the brain
Glucose is metabolized more quickly by active brain regions
How are active brain regions represented?
Active brain regions are represented by hypermetabolic regions by PET scanners
What is the protocol for EEG?
Electrodes places on scalp and connected to an amplifier
What do EEG measure?
Voltage fluctuations in the brain over a period of time
What is the protocol for computerized tomography?
Computer combines multiple x-rays taken at different angles
What does computed tomography measure
Detailed structure of internal organs and tissues at a single point in time
What is the protocol for fmri?
Scanner detects the differential properties of oxyhemoglobin and de oxyhemoglobin
What does fmri measure?
Changes in blood oxygenation in the brain over time
What is the protocol for PET scan
Scanner detects radioactive tracer attached to glucose analog
What does PET measure
Changes in glucose metabolism in the brain over time
