Biomedical subjects

Kazuo Mori

Publications and source records attributed to Kazuo Mori.

5 recordsLinked to original sources

PubMed2005

Elicitation of spontaneous mirror reversal drawing on the forehead.

32 Japanese participants drew symmetrical and asymmetrical letters on their own foreheads. By observing their drawing strokes, it was judged that 29 of them drew symmetric letters in reverse, that is, as if these were viewed from inside the head. However, 14 of these 29 seemed to have noticed their reversed perception because they drew asymmetric letters intentionally reversed so they would appear correct when viewed from outside. Only three participants drew the letters in a normal way irrespective of the letter symmetry.

Adolescent↗

PubMed2005

Comments on defining adolescence.

Aspects of a definition for two characteristics of adolescence, being capable of doing something or not and having the right to do it, are proposed since adolescence is a period when a person is capable of but without the right to do something.

Adolescent↗

PubMed2004

Photosensitivity of the central nervous system of Limulus polyphemus.

The photosensitivity of the central nervous system (CNS) of the horseshoe crab, Limulus polyphemus, was investigated by analyzing changes in motor nerve activity in the segmental nerves of prosomal and opisthosomal ganglia. Spontaneous efferent impulses were recorded in the dark from all the investigated segmental nerves. Impulse trains from the 7th dorsal nerve in the prosomal CNS were inhibited in response to illumination of the whole CNS. Impulse trains from each of the 9-13th dorsal nerves in the isolated opisthosomal CNS were inhibited, and the impulse train from each the 14-16th dorsal nerve was elicited or inhibited upon illuminating the whole CNS. Spontaneous rhythmic bursts at 20-80 s intervals were recorded in the dark from the ventral nerves of the isolated opisthosomal CNS. In the presence of light, the rhythmicity of spontaneous bursts disappeared and other species of impulse trains were elicited. In single ganglion preparations, isolated from the rest of the CNS by surgically severing the connectives, similar photoresponses were recorded before and after isolation. These results demonstrate that the CNS of Limulus is a photosensitive organ.

Action Potentials↗

PubMed2004

Physiological and morphological identification of photosensitive neurons in the opisthosomal ganglia of Limulus polyphemus.

The motor outputs of the isolated opisthosomal ventral nerve cord in Limulus polyphemus are modulated by light. We have identified the photosensitive neurons and examined their physiological and morphological properties using intracellular recording and staining techniques. We found that photosensitive neurons are present in each ganglion of the opisthosomal ventral nerve cord. These neurons often discharged action potentials spontaneously in the dark, and they increased the frequency of this discharge in the light. The mean latency (+/-SD) of the light-induced action potential was 2.2 +/- 1.1 s. Cells responded in a graded fashion over a 2-log unit of light intensity. The peak spectral sensitivity was 425 nm or lower. The Lucifer-yellow-labeled photosensitive neurons had oval somata with mean (+/-SD) diameters of 102 +/- 3 microm (long axis) and 75 +/- 5 microm (short axis), and extended their axons to the contralateral region of the ventral nerve cord. The soma had no dendrites, and the axon had thin branches.

Animals↗

PubMed2003

Surreptitiously projecting different movies to two subsets of viewers.

A new technique (manipulation of overlapping rivalrous images by polarizing filters, or MORI) has been invented for presenting on the same screen two different images that can be seen separately by two groups of viewers without their noticing the overlap. It can easily create desired artificial conflicts among viewers. Two perpendicular polarizing filters provide separate invisible channels from dual video projectors to two groups of viewers on a single screen. The basic principle of the presentation technique, details of the apparatus, and limitations are introduced. As an example of the application of this technique, an eyewitness experiment is briefly reported. The results of experiments conducted by the author and colleagues provide evidence of the effectiveness of this technique with various projectors, video materials, group sizes, and ages of participants.

Conflict, Psychological↗