Studies on hearing

Thousands of scientific videos and photos with captions provided by the Inserm laboratories. Available on Serimedis

Thousands of scientific videos and photos with captions provided by the Inserm laboratories. Available on Serimedis

The human cochlea, a part of the internal ear which plays a crucial role in hearing. Here we see the basal cochlear membrane rolled around on itself in two and a half spiral turns. This membrane supports approximately 16000 ciliated cells belonging to the Corti organ which respond to air vibrations and convert these into neuronal signals which produce audible sensations.

The human cochlea, a part of the internal ear which plays a crucial role in hearing. Here we see the basal cochlear membrane rolled around on itself in two and a half spiral turns. This membrane supports approximately 16000 ciliated cells belonging to the Corti organ which respond to air vibrations and convert these into neuronal signals which produce audible sensations.

 

Surface of the Corti organ covered with tectorial membrane (x200). The Corti organ is the sensory component of hearing and extends along the cochlea, containing thousands of ciliated sensory cells.

Surface of the Corti organ covered with tectorial membrane (x200). The Corti organ is the sensory component of hearing and extends along the cochlea, containing thousands of ciliated sensory cells.

 

Disappearance of nearly all of the external ciliated cells from the Corti organ. Disorganisation and hence loss of sensitivity over fifty dB. Serious loss in frequency discrimination. Advanced stage of ageing.

Cochlea.

Disappearance of nearly all of the external ciliated cells from the Corti organ. Disorganisation and hence loss of sensitivity over fifty dB. Serious loss in frequency discrimination. Advanced stage of ageing.

 

The internal ciliated cells in the shape of a club are aligned in a single line. The external ciliated cells seen in green form three lines. Markers: calretinine red, calbindine green.

Surface view of rat cochlea.

The internal ciliated cells in the shape of a club are aligned in a single line. The external ciliated cells seen in green form three lines. Markers: calretinine red, calbindine green.

 

Here we see a line of internal ciliated cells, the stereocils of which are arranged linearly and three lines of external ciliated cells in a staggered arrangement, and therefore the stereocils are organised in a W shape.

Ciliated cells of the Corti organ.

Here we see a line of internal ciliated cells, the stereocils of which are arranged linearly and three lines of external ciliated cells in a staggered arrangement, and therefore the stereocils are organised in a W shape.

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