The Mechanoreceptors of the Mammalian Skin Ultrastructure and Morphological Classification: Ultrastructure and Morphological Classification

ISBN-13: 9783540070979 / Angielski / Miękka / 1975 / 80 str.

Z. Halata

Opis

Whilst most of the senses (hearing, sight, smell and taste) have their own organs, the tactile sense is dependent on the sensory nerve endings of the periph- eral processes of the nerve cells in the spinal ganglia. These nerve endings are distributed over the entire body. They vary in number and structure according to the nature of the tissue. For instance, the quantitative innervation of the mucosa differs from the innervation of the periosteum or the articular capsules. The skin and its related tissues are relatively richly innervated, but here too there are regional differences. Some areas, such as the skin of the back, have relatively few nerve endings, whilst other parts (e.g. the skin of the fingers) are richly innervated. Most authors describe the nerve endings systematically from the surface of the epidermis to the lower layers of the dermis. On the basis of the topographical criteria, we differentiate between epidermal and dermal nerve endings.

Spis treści

Material and Methods.- Results.- A. Epidermal Nerve Endings.- 1. Free Nerve Endings.- 2. Nerve Endings with Specialised Cells (Merkel Endings).- B. Dermal Nerve Endings.- 1. Bulboid Nerve Endings.- a) Simple Bulboid Nerve Endings.- b) Dendritic Bulboid Nerve Endings.- 2. Encapsulated Corpuscles with Inner Core.- C. Morphological Classification of the Mechanoreceptors of the Skin.- D. Types of Glabrous Skin and Their Innervation.- 1. Cone Skin.- 2. Ridged Skin.- E. The Mechanoreceptor Complexes of the Skin.- 1. Structure of the Sinus Hair.- 2. Innervation of the Sinus Hair.- 3. Innervation of the Simple Hair.- Discussion.- A. Epidermal Nerve Endings.- 1. Free Nerve Endings.- 2. Nerve Endings with Specialised Cells (Merkel Endings).- B. Dermal Nerve Endings.- 1. Bulboid Nerve Endings.- a) Simple Bulboid Nerve Endings.- b) Dendritic Bulboid Nerve Endings.- 2. Encapsulated Corpuscles with Inner Core.- C. Morphological Classification of the Mechanoreceptors of the Skin.- D. The Mechanoreceptor Complexes of the Skin.- Summary.- References.