Hand and foot preference in two cultures.

Area of Science:

• Neuroscience
• Human Motor Control
• Behavioral Science

Background:

• Limb preference, or handedness and footedness, is a fundamental aspect of human motor behavior.
• Previous research has explored hand preference, but less is known about the patterns and consistency of foot preference across diverse populations.
• Understanding limb lateralization is crucial for insights into brain organization and motor control.

Purpose of the Study:

• To investigate and compare hand and foot preferences in adult populations from India and France.
• To examine the degree of lateralization for upper versus lower limbs.
• To determine if cultural or geographical factors influence limb preference patterns.

Main Methods:

• Adult participants from India and France completed hand and foot preference questionnaires.
• Questionnaires used a scale assessing preference from extreme left to extreme right, including no preference.
• Laterality index was calculated to quantify hand and foot preferences.

Main Results:

• Both Indian and French participants exhibited stronger right-lateralization for hand actions.
• Foot preferences were less right-lateralized, showing a wider distribution from extreme right preference to no preference.
• Consistent trends in hand and foot lateralization were observed even with smaller sample sizes compared to hand preferences alone.

Conclusions:

• A significant difference exists in the lateralization patterns between upper (hands) and lower (feet) limbs.
• This difference in limb lateralization is consistent across different cultures and geographical locations.
• Further research is needed to elucidate the underlying reasons for the reduced lateralization observed in lower limbs compared to upper limbs.