Hidekazu Wakuri

Histological Studies on the Endocrine Pancreas in the Dog

Based on histological structure and cellular formation of the endocrine pancreas (pars endocrina pancreatis) (PEP) or pancreatic islet (insulae pancreaticae), was divided into two types in the dog.

Binocular Dissecting Microscopic Studies on the Density of Toruli Tactile in the La Mancha Goat

The Merkel cells and associated nervous terminal plates have been called toruli tactiles (TT). These structures can be ubiquitously seen on the shaved hairy skin after staining with a methylene blue solution. Four La Mancha goats of both sexes were examined for the density of TT. TT were visually located under a binocular dissecting microscopic (14 ×) and then the number of TT in the field was directly counted. The density of TT in different corporal areas of the body surface was estimated from the mean of several two‐cm square samples of skin.

Density of Toruli Tactiles in the Japanese Monkey

Two Japanese monkeys of both sexes were examined for density of Toruli tactiles (TT) on the shaved skin stained with methylene blue solution. Each Torulus tactilis was located by the aid of a binocular loupe and marked with white lacquer. The distribution of marked TT was estimated by a mean of TT per 2cm square (2CS) of skin on the body surface. The results obtained are as follows. The mean per 2CS on the entire body surface was approximately 8.7 in the female specimen and approximately 10.0 in the male specimen. The density of distribution of TT was highest in the temporal and buccal areas, on the neck, loins and the dorsal and lateral surfaces of the arms and forearms. Density was moderate in the parieto‐occipital and gluteal areas, the back, the ventral surface of the cranial half of the trunk and the lateral surface of the thigh. Density was low, to near absence in the circumanal area, on the nose, upper eyelids, cars, ischial callosities, external genitals, palms and soles.

Variations of the Extensor Digitorum Brevis Muscle in the Dog

The variation of the extensor digitorum brevis (EDB) muscle was examined in 113 hindlimbs of dogs. Four types were discriminated in this muscle. Of the three heads of the muscle, the medial head went to the 2nd digit in types I and II, and to the 2nd and 3rd digits in types III and IV. The middle head went to the 3rd digit in types I and IV, and to the 3rd and 4th digits in types II and III. The lateral head went to the 4th digit in all the types. Type II was the most common of the four (78.76 %). Type III was found in 8.85%, type 1 in 973% and type IV in 2.66%.