Mechanisms of
Sperm Motility:
Dr. Charles Lindemann
Video Clips and Pictures
Here are video sequences from some of the finer experiments performed in our lab over the last few years. They are listed in chronological order. To shorten download times, these files have been compressed. Thus, the image quality is reduced. You can access the abstract and complete citation information related to each video clip by clicking on the word "reference" after each heading.
  This picture shows a bull sperm cell. The bar represents 20 micrometers (millionths of a meter).
  This is a mouse sperm cell. A glass probe is seen bending the tail and producing a counterbend. The bar represents 20 micrometers.
  This is a rat sperm cell showing a counterbend. The bar represents 20 micrometers.
  This is a sea urchin sperm cell showing a counterbend. The bar represents 15 micrometers.
  This is an example of Chlamydomonas (green algae); a single-celled organism. The bar represents 10 micrometers.
 
Blocked bull sperm: Reference
Principal or "P" block
Reverse or "R" block

Clipped bull sperm: Reference
An 18-µM flagellum still beats
Cut flagellum swims away
 
Force of bull sperm: Reference
Principal or "P" isometric stall
Reverse or "R" isometric stall

Force of a rat sperm calcium hook: Reference
Rat calcium hook force
  Counterbends:
Counterbend in Mouse sperm
Counterbend in Rat Sperm

Mouse Sperm Manipulation:
Vanadate-Treated, Reactivated Wild-Type Mouse Sperm
Vanadate-Treated, Reactivated SPAG16L-Deficient Mouse Sperm

  Cut Bull Sperm still moves  
     
     
     
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