Abstract of the hypothesis: increased muscle tone (chronic contraction) of the facial and masticatory muscles as a result of psychophysiological conditioning (stimulus-response pattern) caused by interpersonal interaction

Article: https://user2704.substack.com/p/caus...n-hair-loss-is

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Name:	Hair loss in Temple.jpg
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figure – Men with hair loss in the forehead and temple area. below: increased muscle tone (chronic contraction) of the corresponding mimic muscles (coloured red)

Click image for larger version

Name:	Hair loss in crown.jpg
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Size:	18.7 KB
ID:	500471
figure – Man with hair loss at the crown of the head. below: increased muscle tone (chronic contraction) of the corresponding mimic and masticatory muscles (coloured red)