Perception, Reaching, Grasping

What is figure-ground discrimination

Discrimination of main focus/subject from background

• Background could also be other objects

Visual agnosia

Inability to recognize familiar objects, damage to ventral (what) pathway

What is prosopagnosia

Inability to tell faces apart (damage to R fusiform in ITC)

What is anosognosia

Unawareness or denial of deficits/illness, often acute effect of something

What is asomatognosia

Inability to identify own body parts as part of self, R parietal lobe

Figure-ground discrimination brain area

R P-O cortex

Spatial neglect is damage in - - - -

R PPC

This task involves…

• Target localization

• Reaching

• Grasping

• Manipulation

• Eye-head coordination

• Postural stability, inertial resistance

• Grip formation, grasp, release

• Reflexive and voluntary movements

Which motor cortices exert an influence on L limb

Both (R a bit more though)

Eye-head-trunk coordination by distance

Near periphery- eye

Far periphery- eye and head

Farthest periphery- eye, head, and trunk

Coupling of coordination affected in - and - -

CP, cerebellar damage

What is Fitts´ Law

Movement time increases when task precision does

Formation of internal models, movement planning, and target positioning for eyes and limbs (coordinates) is done by -

• One effect of lesion is -

PPC

• Apraxia

Cerebellum for - - and - - of movement

• How it works

Error correction, fine tuning

• Sensory info through mossy fibers, climbing fibers convey error signal and trigger calcium spike in Purkinje

What exercises are helpful in cerebellar patients

Coordination and core

APAs rely on - as well

Cerebellum