Toshiharu Sasano
Nagasaki University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Toshiharu Sasano.
Acta Oto-laryngologica | 1989
Kohichiro Shigeno; Tetsuya Egami; Toshiharu Sasano
Injecting of various solutions into the middle ear cavity of cats and rabbits provoked certain characteristic types of nystagmus which resembled caloric nystagmus or clinical cases of peripheral vestibular disorders. Solutions with different degrees of specific gravity, osmotic effect and ion composition were used in this study. Direction-changing positional nystagmus, irritative nystagmus, and paralytic nystagmus were elicited according to the physical or chemical properties of each solution. Histological findings showed mild changes in the perilymphatic space and/or in the endolymphatic space in the period with some characteristic types of nystagmus. Infiltration of the substances into the inner ear fluids from the middle ear cavity via a round window membrane were probably responsible for these types of nystagmus.
Acta Oto-laryngologica | 1993
Tetsuya Noda; Shigeto Nakajima; Toshiharu Sasano; Koichiro Shigeno
Retro-auricular galvanic stimulation in Rombergs posture elicits body sway which consists of an initial response (IR) and a deviation response (DR). Generally, anodal stimulation of the right side elicits IR to the left and DR to the right. We measured the deviation response (VDR) in various conditions in normal subjects. There was no significant difference between mean VDR in the standing posture weighted on the left foot (0.49 +/- 0.17 cm) and on the right foot (0.39 +/- 0.20 cm). Stimulation in the squatting posture also elicited IR to the left and DR to the right. Stimulation of the right side produced DR backward and to the right in the condition of the head facing to the right, and forward and to the right in the condition of the head facing to the left. The same body sway response as the after galvanic stimulation was also induced by non-galvanic maneuvers like inclining the head or moving the finger. Anodal stimulation in the sitting posture elicited slight but apparent head inclination to the stimulated side. These results suggest that cervical muscles play an important role in the galvanic body sway test (GBST), viz. IR and DR seemed to be secondarily produced by changes in the muscular tension of the neck.
Auris Nasus Larynx | 1992
Hidetaka Kumagami; Toshiharu Sasano
A 30-year-old male with delayed endolymphatic hydrops was given a sac operation. An intradural portion of the endolymphatic sac was resected and the epithelial surface was examined under a scanning electron microscope. The epithelium showed fibrous degeneration and disappearance of the epithelial cells. Pathogenesis of degeneration of the endolymphatic sac is discussed.
Equilibrium Research | 1989
Toshiharu Sasano
Equilibrium Research | 1987
Toshiharu Sasano; Shigeto Nakajima; Koichiro Shigeno; Hidehaku Kumagami
Equilibrium Research | 1994
Toshiharu Sasano
Equilibrium Research | 1993
Shigeto Nakajima; Toshiharu Sasano; Tetsuya Noda
Equilibrium Research | 1993
Shigeto Nakajima; Toshiharu Sasano; Hidetaka Kumagami
Nippon Jibiinkoka Gakkai Kaiho | 1991
Toshiharu Sasano
Audiology Japan | 1990
Toshiharu Sasano; Shigeto Nakajima; Takashige Nakata; Hidehaku Kumagami