Awareness of Time
Pp. 60-68 (9)
Paulo J. Negro
Humans sense the passage of time as a subtle form of experience defined by
an absence. Studies of interval timing often focus on the individual´s assessment of a
period with no stimulation between two auditory stimuli. Time is an inherent part of
Shannon’s information. Brain function contains an invariant time-dimension. Every
cortical circuit seems to have an inherent computational ability for timing regulated by
time-dependent changes in synaptic and cellular properties. Local networks affect
qualia of time experienced both in visual and auditory experiments. State-dependent
local learning and oscillatory phase shifts support a role for early cortical processing in
time discrimination. Brain oscillatory phases predict conscious perception. The
temporal cortex adjusts its own oscillatory phase, mapping its window of analysis of
incoming time-sensitive events. These phase adjustments support the existence of
active brain-centric expectations in time perception and other conscious experiences.
Alpha power, Auditory Consciousness, Brain-Centric Expectations,
Early Cortical Processing of Information, Entrained Neuronal Stimulation,
Interval Timing, Multimodal Integration, Near-Threshold Perception, Neural
Assemblies, Oscillatory Phase, Pre-Stimulus, Scalar Timing Theory, Shannon’s
Information, Short-Term Synaptic Plasticity, Striatal Beat-Frequency Model,
State-Dependent Expectations, Temporal Dynamics, Time Perception, Visual
Cortex Adaptation, Window of Analysis Calibration.
Assistant Clinical Professor of Psychiatry and Behavioral Sciences at the George Washington School of Medicine and Health Sciences.