lecture10-08 - Describe 2 functions of eye movements and...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Types of Eye Movement Information Gathering Stabilizing Voluntary (attention) Reflexive Saccades vestibular ocular reflex (vor) new location, high velocity, ballistic body movements Smooth pursuit optokinetic nystagmus (okn) object moves, velocity, slow    whole field image motion Vergence change point of fixation in depth slow, disjunctive  (eyes rotate in opposite directions) (all others are conjunctive ) Fixation:  period when eye is relatively stationary between saccades. Describe 2 functions of eye movements and give an example of each.  
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Describe foveal over-representation in the visual cortex.  Give a reason for this over-representation. Draw a diagram to  illustrate your answer.
Background image of page 2
Cortical  Magnification Larger cortical area for neural projections  from the fovea than periphery Primary Visual Cortex: V1 Describe foveal over-representation in the visual cortex.  Give a reason for this over-representation. Draw a diagram to  illustrate your answer.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Give a reason for this over-representation.       -    High density of cone photoreceptors in central fovea.
Background image of page 4
Describe your results in the ball-catching lab.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Draw a sketch of the brain showing the structures involved  in the generation of a saccadic eye movement. Specify the  function of these structures (to the extent that this is possible)
Background image of page 6
target selection signals to muscles inhibits SC saccade decision saccade command monitor/plan movements Function of Different Areas
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sketch a muscle, including the muscle spindle and  the sensory and motor nerve fibers.  
Background image of page 8
MUSCLEFIBRE/SPINAL Spindles Golgi Extrafusal Intrafusal Secondary Encoding (Less Sensitive) Dorsal Ventral
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Role of Visual Feedback Question: why does error increase with speed? Note: 50 cm/sec = 5cm/100msec How does the speed of a movement (e.g. reaching) affect  its accuracy? Explain why.
Background image of page 10
Draw a sketch of a feedback system and a feedforward  system. Give an example of each (for visuo-motor control).  
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 28

lecture10-08 - Describe 2 functions of eye movements and...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online