A rapid startle response in larval lampreys

Brain Res. 1985 Dec 9;358(1-2):367-71. doi: 10.1016/0006-8993(85)90986-2.


Electromyography (EMG) and cinematography revealed a rapid, vibration-evoked startle response in intact larval lampreys. Vibratory stimuli produce simultaneous contraction of both sides of the body, and the response is lost after labyrinthectomy. Midbody EMGs exhibit a stimulus-response latency of 26.5 +/- 4.2 ms. Direct stimulation of the otic capsules, using an electrically driven probe applied to a semi-intact preparation, first evokes a volley of giant axon spikes in the spinal cord followed by the bilateral trunk response.

MeSH terms

  • Animals
  • Central Nervous System / physiology*
  • Ear, Inner / physiology*
  • Electromyography
  • Fishes / physiology*
  • Lampreys / physiology*
  • Motion Pictures
  • Muscles / physiology
  • Posture
  • Reaction Time / physiology
  • Reflex, Startle / physiology*
  • Vibration