7. Brain systems Flashcards
What part of the eye focuses an inverted image of the world onto the retina? (Brain systems psychobiology)
The cornea and the lens
What transduce the physical energy of the light into depolarisation of the retinal ganglion cells? (Brain systems psychobiology)
Specialised cells in the retina (cones and rods)
What does the depolarisation of the retinal ganglion cells do? (Brain systems psychobiology)
Results in trains of action potentials in the optic nerve
What do optic nerve fibres from the nasal half of the retina do? (Brain systems psychobiology)
Cross the midline and protect contralaterally
What do optic nerve fibres from the temporal half of the retina do? (Brain systems psychobiology)
Project ipsilaterally and do not cross the optic chiasm
The arrangement of optic nerve fibres (nasal and temporal) is typical with what type of vision? (Brain systems psychobiology)
Binocular
What does the dorsal stream focus on? (Brain systems psychobiology)
Where
What does the ventral stream focus on? (Brain systems psychobiology)
What
Where is the primary motor cortex located? (Brain systems psychobiology)
The strip at the back of the frontal lobe
What is the basal ganglia needed for? (Brain systems psychobiology)
Movement control
What is saccades? (Brain systems psychobiology)
Rapid eye movement
What does saccades require? (Brain systems psychobiology)
Disinhibition of superior colliculus by pause of firing of cells within substantia nigra
What are the two cortico-straiato-thalamo-cortical loops? (Brain systems psychobiology)
- Motor loop
- Oculomotor loop
What is the cortical input of the motor loop? (Brain systems psychobiology)
motor, premotor and somatosensory cortex
What is the cortical input of the oculomotor loop? (Brain systems psychobiology)
Posterior priatal and prefrontal cortex
