| In awake, behaving macaque monkeys, we record
single unit activity and event - related potentials from inferotemporal
cortex, hippocampal formation and frontal cortex, brain areas
involved in attention, visual perception and memory.
Areas of studies:
Visual memory processes reflected in the single unit activity
We are interested in two neuronal mechanisms underlying visual
memory. One of them we term stimulus-specific adaptation.
In this phenomenon, the first presentation of an unfamiliar
visual stimulus generates a stronger cell response than the
same stimulus when it is re-presented. The second mechanism
is termed delay activity. In this phenomenon, neurons show
elevated discharge rate during active image rehearsal (between
image presentations) in a delayed matching-to-sample task.
Event-related potentials and response of single units
in temporal cortex to saccadic eye movements
In 1994 we found that in darkness saccadic eye movements
produce robust modulation of electrical activity in temporal
cortex. We are interested in the role which this saccadic
modulation may play in mechanisms of attention and memory.
|
|
Sobotka, S. and Ringo, J.L. 2001, Saccadic eye movement
influence functional connectivity within temporal lobe.
J. Neurophysiol, In revision.
Sobotka, S., Gaffan, D. and Ringo, J.L. 2001, Neurons
in inferotemporal cortex show delay activity without input
from prefrontal cortex. Abstract for the 31th Annual Meeting
of Society for Neuroscience. San
Diego, CA, 10-15.11, V.27.
Sobotka, S. 2000, Involvement of single unit activity in inferotemporal
and perirhinal cortices in recognition memory of visual
objects in the macaque. Acta Neurobiol. Experi.,
60: 219-226.
Sobotka,S. 2000, The role of neurons in inferotemporal and perirhinal
cortices in visual recognition memory (Habilitation thesis
in Polish). The Nencki Institute of Experimental Biology.
Sobotka, S. 1999, Influence of saccadic eye movements on visual responses
of single neurons in temporal cortex (In Polish). Psychol. Rev. 42, 1-2: 183-190.
|
