The utility of entrainment is thought to be the organization of transient excitability states within neuronal
populations
68
–
72
. Discrete high excitability periods constitute “windows of opportunity” for
input in
to
sensory
cortex,
as
evidenced by peri
-
threshold detection studies in somatosensory
73
, visual
33,74,75
, and auditory
46,60,76
regions.
During listening,
such
windows might
serve to
segment speech to facilitate comprehension
77
. More
generally, the temporal organization of high excitability periods could serve to minimize temporal uncertai
nty in
stimulus processing and detection
7,78
–
80
. This view was corroborated by
a
behavioral
study of
responses to the
same white noise
stimulus used in these experiments
that
revealed a striking relationship between detection
accuracy and the preceding rhythmic stimulus
81
. With direct intracranial recordings, we found
that
low
-
frequency phase reset
anticipates
the first “missing” acoustic edge.
These results constitute
strong evidence for neural mechanism
s
in early auditory cortex supporting
entrainment and prediction,
both
fundamental computational element
s
in models of speech perception
4,8,9,22
.
T
he characteristics of these mechanisms
contrast with the
presumption
of “a principled relation between the
time scales present in speech and the time constants underlying neuronal cortical oscillations that is both a
reflection of and the means by which the brain converts speech rhythms into linguistic segments”
4
supported
by “cascaded cortical oscillations”
8
or a “hierarchy of nested oscillations”
9
.
O
ur results
are
instead consistent
with
the predictive encoding of “when” by a bandlimited complex of discrete
computational channels
, each
arising from distinct patterns of hi
erarchical cortical connectivity
22
.
supported by 8 fans who also own “Supratemporal Dissociations”
furious spurred rhythms attack the listener, accented with clever pauses. Beautiful sounds withdrawn and realized in equally considered measure. bkudler
From Bristol, UK, the music of Object Truth runs from hushed, atmospheric synth songs to full-bodied, bass-heavy bangers. Bandcamp New & Notable Mar 5, 2021