Speech pause time as a method for the evaluation of psychomotor retardation in depressive illness.

Psychomotor retardation is important in some depressed patients. We found that speech pause time (SPT) during a counting test correlated with the reaction time of both depressed patients and controls. It also correlated with global psychomotor retardation measured on Widlocher's scale.

Influence of mitochondrial inhibitors on the respiration and energy-dependent uptake of iodide by thyroid slices.

The influence of mitochondrial inhibitors, including oligomycin, antimycin and rotenone, on the iodide and oxygen uptake and the nucleotide content of incubated sheep thyroid slices was investigated. Each inhibitor strongly suppressed both iodide and oxygen uptake, and decreased the nucleoside triphosphate content of the slices. In most cases the addition of glucose or mitochondrial substrates restored iodide uptake in inhibitor-treated slices.