WEEK 3 Flashcards
Transcranial Magnetic Stimulation (TMI) is
an intense magnetic field temporarily deactivates neurons below the magnet
Transcranial Direct Current Stimulation (tDCS) is
a low but constant current is applied to temporarily increase ongoing neural activity
Transcranial Alternating Current Stimulation (tACS) is
a low but alternating current is applied to temporarily increase or decrease neural activity at a particular frequency
How can atypical behaviour in the brain be identified, give some examples
Atypical behaviours, variations can be identified using structural imaging measures e.g. Computerized axial tomography CAT scan: this involves dye being injected into the blood and -rays are passed through the head. A scanner then rotates and measurements are taken at each angle. A computer constructs an image that can be used to identify tumours and abnormalities. Magnetic Resonance imaging (MRI): a powerful magnetic field is used to image the brain
What is the Research Domain Criteria and its underlying assumptions
The RDoC is a framework aiming to inform our understanding of mental health and illness in relation to functional variation in biological systems
Its underlying assumptions consist of:
- mental disorders are disorders of brain circuits
- Neural circuit dysfunction can be identified with functional measures
- Biosignitures will be found to aid in clinical diagnosis and clinical management
What are the three ways we categorise neurons:
- Sensory neurons: that take info from the peripheri and deliver it to the NS
- Relay neurons/interneurons: get informed by the sensory neurons and talk to the other neurons (e.g. other interneurons or motor neurons)
- Motor neurons: Neurons that innovate your muscles
What are the basic shapes of neurons
Anaxonic neurons
Bipolar neurons
Unipolar neurons
Sensory neurons
Motor neurons
Which neuron does not have an axon
Anaxonic Neurons
Which neuron has two big ends and generally does not generate action potentials
Bipolar neurons
Which neuron looks similar to bipolar neurons but the axon is on the side
Unipolar neurons
What are sensory neurons
Sensory neurons are typically bipolar neurons. They connect to receptor cells which are independent cells from the neuron and are connected to a nerve cell.
Sensory neurons need to travel long distances.
What does the Motor neuron look like
They have a relatively large cell body that has many dendrites next to it.
Where are motor neurons located
In the spinal chord
