of the damage urns{asinpri )bu is e ation and eye posi p of PG neglec a5 15a sions includes a c ected hem pace [14 of huma ubjects to prismat hat similar distinctions can [101.Shifts of neuro gical obse with eye pos ion or stimulus locarion.Cor keys have elucida of the ifts h t o in a way tha tra able the covert movement of ntion that area PG re sextensively pre s [5)have dem ation icnswihpostetiorpaietallesiog casca they cannot disengage the focus of proximal (upstream)sc inform attention for con sive shift provide to (and eventually to arise thr ough is impo PG m un d s the as.Accordi PG in the form of a co thus in oor sensory nation (3)en Such a distr ibute (an hiness of se L nantic imnar t of certain stimuli aded)infor ation in pq spatial coordinates on corresponding groups of PG ome of the ne PG increase firing able information has also been gathered on ce is made beh but not hen th ent h ng di consequ behav t objecs or to thei of the ote atedwithsimilar activity. hat normal the PG plexand tsk-reaed rather mal's ability determin the rela e Dosition of ex or co 21 des and may also infue the sho ic visa nation abou movements since damage to one d ye po n [10].An individual PG neuron olishes the 1261 The supor coliculus may be its retinotonic feld de on eye position,and a mportantfor fovearing the gen eral area of iner f that regio Nerolopical prosrress:Mesulam:Neurocognitive Networks 599