PSYC1003 Lecture Notes - Lecture 9: Absolute Threshold, Neural Adaptation, Detection Theory
Psychology 1003 October 3rd 2016
Deep Brain Stimulation: doctors wire leading containing electrodes in the brain to reduce symptoms
associated with movement disorders.
Studying Brain Function
Transcranial Magnetic Stimulation
Positron Emission Tomography (PET): -radioactively tagged chemicals markers of metabolic activity in
the brain, monitored by x-ray.
Computerized Tomography (CT):- series of enhanced x-rays, detect tumours and other lesions.
Magnetic Resonance Imaging (MRI): magnetic fields to image brain structure, higher definition imges
than CT scans, more angles than CT scans.
Functional Magnetic Resonance Imaging (FMRI): - Monitors blood flow and oxygen consumption in the
brain to identify areas of high activity. More precise than a PET scan. More blood flow = greatest
neuronal activity
Functional Imaging: Structural Imaging:
- EEG - CT
- Electrode stimulation -MRI
- TMS -FMRI (BOTH)
- PET
Structural and functional imaging:
- fMRI
Brain & Behaviour
The Hindbrain: basic functions
- Medulla: breathing, muscle tone, and reflexes.
- Pons: sleep and arousal.
- Cerebellum: coordination of movement and equilibrium.
The Midbrain: sensory functions and voluntary movement
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Document Summary
Deep brain stimulation: doctors wire leading containing electrodes in the brain to reduce symptoms associated with movement disorders. Positron emission tomography (pet): -radioactively tagged chemicals markers of metabolic activity in the brain, monitored by x-ray. Computerized tomography (ct):- series of enhanced x-rays, detect tumours and other lesions. Magnetic resonance imaging (mri): magnetic fields to image brain structure, higher definition imges than ct scans, more angles than ct scans. Functional magnetic resonance imaging (fmri): - monitors blood flow and oxygen consumption in the brain to identify areas of high activity. Reticular formation: sleep, arousal, breathing, and pain perception (runs from hindbrain to midbrain) The forebrain: largest and most complex region of the brain. Thalamus: way station for all incoming sensory functions. Limbic system: involved in emotion, motivation, memory, and other aspects of behaviour. Cerebral cortex: responsible for complex mental processes; two hemispheres. Cerebral hemispheres: two specialized halves connected by the corpus callosum: Right hemisphere: nonverbal processing: spatial, musical, visual recognition.
