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[Aetiological factors in left-handedness]
Srpski Arhiv Za Celokupno Lekarstvo
|June 9, 2006
Summary
Laterality, the body
Area of Science:
- Neuroscience
- Human Biology
- Genetics
Context:
- Lateralisation links one body side's extremities and senses to the opposite hemisphere's motor and sensory areas.
- Dominant laterality refers to a preferred limb or sense in complex psychomotor tasks.
- Handedness (right or left) is a common manifestation of laterality, with right-handedness being more prevalent.
Purpose:
- To explore the genetic and environmental factors influencing lateralisation, particularly left-handedness.
- To investigate the role of the intrauterine environment, including hormones and ultrasound exposure, in foetal development and lateralisation.
- To examine the historical shift in socio-cultural pressures impacting the expression of left-handedness.
Summary:
- While genetic factors are the primary theory for lateralisation, research is exploring environmental influences on left-handedness.
- Intrauterine factors like hormones and ultrasound exposure are significant, with potential links to non-right-handedness in males.
- Historical data indicates a decrease in left-handedness, likely due to reduced socio-cultural pressure.
Impact:
- Understanding the complex interplay of genetics and environment in lateralisation provides insights into brain development.
- Identifying environmental factors influencing lateralisation may inform future research on neurodevelopmental conditions.
- The study highlights the evolving societal acceptance of handedness variations.
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