PubMed:10762373 JSONTXT 8 Projects

Annnotations TAB TSV DIC JSON TextAE

Id Subject Object Predicate Lexical cue
T1 0-137 DRI_Outcome denotes Fast oscillations display sharper orientation tuning than slower components of the same recordings in striate cortex of the awake monkey.
T2 138-393 DRI_Outcome denotes We wanted to know whether fast oscillations ( approximately 30-80 Hz) in striate cortex of awake monkeys show sharper orientation selectivity than (i) slower components, including spike rate modulations, and (ii) broad-band signals of the same recordings.
T3 394-573 DRI_Challenge denotes As fast oscillations are probably of cortical origin this may further clarify whether cortical network mechanisms are substantially involved in generating orientation selectivity.
T4 574-801 DRI_Approach denotes We recorded multi unit activity (MUA) and local field potentials (LFP, 1-140 Hz) by the same microelectrodes from upper layers of macaque striate cortex during visual stimulation with grating textures of different orientations.
T5 802-1011 DRI_Approach denotes An orientation index (OI) was derived from the cortical responses in three frequency ranges (low, 0-11.7 Hz; medium, 11.7-31.3 Hz; and fast oscillations, 31.3-62.5 Hz) and for the broad-band LFP and MUA power.
T6 1012-1147 DRI_Unspecified denotes (i) Both LFP and MUA fast oscillations reveal a higher orientation index than signal components in the low and medium frequency ranges.
T7 1148-1314 DRI_Unspecified denotes (ii) For MUA the orientation index was significantly higher with fast oscillations than for the lower frequency ranges and the initial broad-band transient responses.
T8 1315-1499 DRI_Outcome denotes (iii) LFPs show a significantly higher orientation index only for the fast oscillations during sustained activation compared with their broad-band power during the transient responses.
T9 1500-1684 DRI_Outcome denotes Thus, our main result is the sharper orientation tuning of fast oscillations in spike activities of local populations compared with slower components of the same broad-band recordings.
T10 1685-1915 DRI_Outcome denotes As fast oscillations occur synchronized in the awake monkey's striate cortex we assume that they have enhanced probability of activating successive stages of visual processing and hence contribute to the perception of orientation.