Myelinated fibres in the human sympathetic paravertebral chain were examined histologically and in single teased fibre preparations in various age groups in subjects dying from disorders not affecting primarily the autonomic nervous system. An increase in fibre density predominantly due to an increase in the number of small fibres was found in older subjects. A correlation between internodal le...

Changes with age in internodal length in the sural nerve in man have been discussed by Lascelles and Thomas (1966). They reported their findings in the sural nerve obtained at necropsy in 14 subjects of ages ranging from 18 to 80 years. In the 10 subjects under the age of 65 years the correlation between internodal length and the maximum diameter of single nerve fibres was found to be close, es...

In myelinated peripheral axons, Kv1 potassium channels are clustered at the juxtaparanodal region and at an internodal line located along the mesaxon and below the Schmidt-Lanterman incisures. This polarized distribution is controlled by Schwann cells and requires specific cell adhesion molecules (CAMs). The accumulation of Kv1 channels at the juxtaparanodal region depends on the presence of Ca...

An electron microprobe (EMP) analysis of silica (SiO,) deposition in the epidermis of developing internodes of the perennial scouring rush (Equisetum hyemale var. affine) indicates that SiO, is first detected in the stomata1 apparatus beginning with internode 3, then the epidermal papillae (internode 8), and finally in radial cell walls of the long epidermal cells (internode 10). This process i...

Characean internodal cells generate receptor potential in response to mechanical stimuli. We studied responses of internodal cells upon long-lasting stimulus and the results were as follows. (1) The cell generated receptor potential at both moments of compression and decompression. (2) The receptor potential (∆Em) was significantly larger at the moment of decompression than at the compression. ...