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FLORIDA STUDY: Fingers have sex hormone receptors!
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Modern Hand Reading Forum - Discover the language of your hands: palm reading & palmistry forum! :: III - MODERN HAND READING - Various systems for reading hands! :: IIIa - Modern Palmistry: general topics, questions :: IIIi - 2D:4D Finger ratio ('digit ratio')
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FLORIDA STUDY: Fingers have sex hormone receptors!

For quite a few years researchers have assumed - based on indirect evident - that finger length development, and especially the 2D:4D digit ratio, is influenced by sex hormones. However, until now direct experimental evidence was lacking. Researchers from Florida have reported an important discovery. They have discovered via a study of the limb buds in mice – which are known for having a digit length ratio similar to humans - that human fingers are likely to have likewise sex hormone receptors as seen in the paws of mice.
Some comments by e.g. 'finger professor' John Manning about this new study:
http://fingerlengthdigitratio.wordpress.com/2011/09/06/study-points-out-fingers-have-sex-hormone-receptors-indeed/
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Martijn (admin) wrote:


Interesting article, too
Patti- Posts : 3912
Join date : 2010-07-24
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Thanks Patti

PS. Manning e.g. commented:
"When Zheng and Cohn blocked testosterone receptors, they got a female digit ratio," Manning said.
"When they added testosterone they got super male ratios, and when they added estrogen, super female ratios. And they've provided us with a list of 19 genes that are sensitive to prenatal testosterone and prenatal estrogen."
"I find this completely convincing and very useful," Manning said.
"We can now be more focused in our examination of the links between digit ratio and sex-dependent behaviors, diseases of the immune system, cardiovascular disorders and a number of cancers."

Professor John Manning
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
I always had a problem that the 2D:4D explanation was based on an assumption. So it is very encouraging that these results in mice go some way to confirming the assumption about pre-natal exposure to sex hormones being directly linked to 2D:4D ratio.
The only research I remember reading before was an experiment done on pheasant eggs.
http://www.springerlink.com/content/x680rhqt25048744/
The only research I remember reading before was an experiment done on pheasant eggs.
http://www.springerlink.com/content/x680rhqt25048744/
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
""They have discovered via a study of the limb buds in mice – which are known for having a digit length ratio similar to humans - that human fingers are likely to have likewise sex hormone receptors as seen in the paws of mice""
Ok, so if we're talking about sex hormone receptors, isn't it to do with the touch?, not finger length. Wasn't the finger length the connection with the mice only a comparison to humans? I think we have sex hormone receptors in our hands, .. I know if I touch something that feels nice...well..it feels nice.
Ok, so if we're talking about sex hormone receptors, isn't it to do with the touch?, not finger length. Wasn't the finger length the connection with the mice only a comparison to humans? I think we have sex hormone receptors in our hands, .. I know if I touch something that feels nice...well..it feels nice.
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Sari wrote:...
Ok, so if we're talking about sex hormone receptors, isn't it to do with the touch?, not finger length. Wasn't the finger length the connection with the mice only a comparison to humans? I think we have sex hormone receptors in our hands, .. I know if I touch something that feels nice...well..it feels nice.
Hi Sari,
Yes, of course... what you write about the 'touch experience' is very true.
However, this study does not relate to the 'touch experience'. Because this study only relates to the issue how the length of the fingers directly relates to hormonal life.
So, I don't think that this study is suggesting anything about our 'touch experience'.
(Not sure that I have understood your words, would you like to see your question answered...? Or were you just sort of thinking out loud?)
Anyway, thanks for sharing your thoughts!

Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Lynn wrote:I always had a problem that the 2D:4D explanation was based on an assumption. So it is very encouraging that these results in mice go some way to confirming the assumption about pre-natal exposure to sex hormones being directly linked to 2D:4D ratio.
The only research I remember reading before was an experiment done on pheasant eggs.
http://www.springerlink.com/content/x680rhqt25048744/
Hi Lynn,
Thanks for mentioning that pheasant-study in the perspective of this new study!

Re: FLORIDA STUDY: Fingers have sex hormone receptors!
The word 'receptors' confused me I think, and maybe i shouldn't think so loud.

Re: FLORIDA STUDY: Fingers have sex hormone receptors!

Off topic
About the 'touch experience'

Women Tend to Have Better Sense of Touch Due to Smaller Finger Size
http://ts-si.org/biology/21823-women-tend-to-have-better-sense-of-touch-due-to-smaller-finger-size
Research in The Journal of Neuroscience
http://www.jneurosci.org/content/29/50/15756.long

Roosi- Posts : 94
Join date : 2011-08-28
Location : Estonia
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Roosi wrote:![]()
Off topic
About the 'touch experience'![]()
Women Tend to Have Better Sense of Touch Due to Smaller Finger Size
http://ts-si.org/biology/21823-women-tend-to-have-better-sense-of-touch-due-to-smaller-finger-size
Research in The Journal of Neuroscience
http://www.jneurosci.org/content/29/50/15756.long
![]()
Thanks Roosi!
Interesting that they have focused on the number of sweat pores in a given space. I wish they had taken a few extra steps and made note of the pattern of the fingerprint involved as the sweat pores are only in the ridges and not in the groove between ridges.
As it is, the results appear to show a difference between male and female but nothing about the comparisons within the male and female groups.
It is already known that in development the nerve cells or neurons are in place prior to the formation of the ridges themselves which indicates the nerves are in the pattern of the final fingerprint.
Patti- Posts : 3912
Join date : 2010-07-24
Re: FLORIDA STUDY: Fingers have sex hormone receptors!

Patti wrote:
Thanks Roosi!
Interesting that they have focused on the number of sweat pores in a given space. I wish they had taken a few extra steps and made note of the pattern of the fingerprint involved as the sweat pores are only in the ridges and not in the groove between ridges.
As it is, the results appear to show a difference between male and female but nothing about the comparisons within the male and female groups.
I agree with you.

Another interesting study
Fingerprint Ridge-Count Difference between Adjacent Fingertips (dR45) Predicts Upper-Body Tissue Distribution: Evidence for Early Gestational Programming
http://aje.oxfordjournals.org/content/153/4/338
The size of a fetal fingertip might be influenced by factors that stimulate or inhibit growth along the developmental axis extending from the brain to the lower limbs. Each fingertip is related neurologically to a spinal-cord segment in a range that includes the sixth through the eighth cervical levels. We hypothesized, therefore, that a large ridge-count difference between fingers on the same hand might reflect circumstances associated with relative inhibition of caudal growth. An embryo or fetus developing under such conditions might accumulate relatively less tissue in the lower body.


Roosi- Posts : 94
Join date : 2011-08-28
Location : Estonia
Re: FLORIDA STUDY: Fingers have sex hormone receptors!
Roosi wrote:![]()
Another interesting study
Fingerprint Ridge-Count Difference between Adjacent Fingertips (dR45) Predicts Upper-Body Tissue Distribution: Evidence for Early Gestational Programming
http://aje.oxfordjournals.org/content/153/4/338
The size of a fetal fingertip might be influenced by factors that stimulate or inhibit growth along the developmental axis extending from the brain to the lower limbs. Each fingertip is related neurologically to a spinal-cord segment in a range that includes the sixth through the eighth cervical levels. We hypothesized, therefore, that a large ridge-count difference between fingers on the same hand might reflect circumstances associated with relative inhibition of caudal growth. An embryo or fetus developing under such conditions might accumulate relatively less tissue in the lower body.
![]()
Yes this is another interesting study. I've seen this report before and I think there is a lot to the concept that the general physique and body language is also reflected in the hands.

Patti- Posts : 3912
Join date : 2010-07-24

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