Some ultrastructural observations on human palmar stratum corneum.

Ultrastructure of human palmar stratum corneum was examined for cell junctions and cytoplasmic material. Interdigitated microvilli are shorter and less uniform in man. Most of these processes are either conical or truncated in shape, as distinct from the relatively smooth cell surfaces except for sigma-shaped junctions in hairy sites. It is suggested that this provides strength against shearing force in the palm and sole. There is less cytoplasmic breakdown in palmar horny cells than in hairy cells.