Contractile properties and histochemistry of extraocular muscle in the pigmented and the albino guinea pig

Abstract. The inferior oblique muscles of pigmented and albino guinea pigs were compared with respect to contractile and histochemical properties. No differences were found between the 2 kinds of animal in twitch and tetanic response or in fatigue properties. They also had the same fiber composition and fiber and capillary densities of their inferior obliques. These findings indicate that differences in eye muscle previously demonstrated and Siamese (albino) cats are related to the state of binocular vision and not to genetic variations between pigmented and albino animals.

[1]  J. Ditunno,et al.  Muscle fiber types. , 1982, Archives of physical medicine and rehabilitation.

[2]  G. Lennerstrand.  Histochemical studies on the inferior oblique muscle of Siamese cats and domestic cats with unilateral lid suture. , 1980, Experimental eye research.

[3]  G. Lennerstrand.  CONTRACTILE PROPERTIES OF EXTRAOCULAR MUSCLE IN SIAMESE CAT , 1979, Acta ophthalmologica.

[4]  M. Bessler,et al.  Abnormal visual pathways in human albinos studied with visually evoked potentials , 1979, Experimental Neurology.

[5]  G. Lennerstrand,et al.  CONTRACTILE PROPERTIES OF EXTRACULAR MUSCLE IN CATS REARED WITH MONOCULAR LID CLOSURE AND ARTIFICIAL SQUINT , 1979, Acta ophthalmologica.

[6]  D. Creel,et al.  Visual system anomalies in human ocular albinos. , 1978, Science.

[7]  G. Lennerstrand,et al.  CONTRACTILE AND HISTOCHEMICAL PROPERTIES OF THE INFERIOR OBLIQUE MUSCLE IN THE RAT AND IN THE CAT , 1977, Acta ophthalmologica.

[8]  R. Giolli,et al.  The primary optic projections in pigmented and albino guinea pigs: an experimental degeneration study. , 1973, Brain research.

[9]  M. Crawford,et al.  Absence of binocular coding in striate cortex units of siamese cats. , 1972, Vision research.

[10]  D. Hubel,et al.  Aberrant visual projections in the Siamese cat , 1971, The Journal of physiology.

[11]  M. Brooke,et al.  Muscle fiber types: how many and what kind? , 1970, Archives of neurology.

[12]  J. Davidowitz,et al.  Structure and function of extraocular muscle fibers. , 1979, Current topics in eye research.