Dynamic activity of bladder neck and external sphincter in ejaculation.
The bladder neck shows a typical electromyographic pattern in ejaculation. It consists of periods of heightened activity rhythmically alternating with intervals of reduced activity signifying muscular contraction and relaxation. This behavior of the bladder neck is confined to its ventral part. Concurrently, the external sphincter shows a short period of increased activity before the typical rhythmical pattern which corresponds to that of the ventral bladder neck.
D000818:Animals; D004285:Dogs; D004542:Ejaculation; D004576:Electromyography; D008297:Male; D009119:Muscle Contraction; D014521:Urethra / Q000502:physiology*; D001743:Urinary Bladder / Q000502:physiology*