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L Mavlov

Publications and source records attributed to L Mavlov.

12 recordsLinked to original sources
PubMed1981

Methods for intramodal and cross-modal investigation of rhythms (temporal patterns) in audition, vision and touch.

An easy and convenient way of instrumental programming and presentation of rhythms (temporal patterns) composed of supershort physical stimulus-markers delimiting empty short and long intervals is described. Patterns are presented by auditory (clicks), visual (flashes), and tactual (mechanical taps) stimulations. Methods for intramodal and cross-modal investigations of rhythm discrimination, as well as rhythm classification (by a structural, "topological" identity matching of patterns) in a "same-different" paradigm are worked out. Methods for investigation of reproduction of homomodal single rhythms perceived auditory, visually or tactually, and of heteromodal (composed of two-modality stimuli) single rhythms are also made up. Finally, a method for bilateral simultaneous perception of two different rhythm patterns via each of the three modalities (dichotically, or through the left and right visual hemi-fields, or through both hands) is described.

Auditory Perception↗
PubMed1980

Amusia due to rhythm agnosia in a musician with left hemisphere damage: a non-auditory supramodal defect.

A case of a severe receptive and expressive amusia in a professional musician following a left hemisphere vascular stroke is reported. Recognition and production of single tones and random tone sequences were found to be surprisingly well preserved. In contrast, the recognition and production of simple rhythm patterns were grossly disturbed. It is suggested that amusia is due to the demonstrated rhythm disturbance. Moreover, it has been found that the defect in recognition and reproduction of rhythms was manifested regardless of the modality of perception, i.e. whether rhythm patterns were perceived by audition, vision, or touch. Therefore, the disturbance of rhythm abilities is supramodal in nature, based probably on the perception of time microintervals. Thus, this type of amusia is a result of a non-auditory supramodal defect, i.e., an impairment of temporal pattern recognition.

Agnosia↗
PubMed1980

Matching spatial patterns within and between passive touch and vision.

A complete design of intramodal and cross-modal matchings of form patterns within and between vision and passive touch was conducted, employing simultaneous or successive mode of stimulation. The simultaneous presentation mode was more efficient than the successive one for vision, but the reverse was valid for passive touch, In intramodal tactual matchings a strategy of detecting the stimulated receptive field overlap was applied by our Ss. In cross-modal conditions, when the visual pattern in a pair was at the first place, performances were more efficient than in the cases when the tactual pattern in a pair went first (V-T greater than T-V). Sex differences were found, young men being superior to young women. "Different" judgements were evidently more difficult than "same" judgments.

Adult↗