ISSN 1308-8734 | E-ISSN 1308-8742
Review
Cerebral Lateralization and Hand Preference
1 Atatürk Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Erzurum  
2 Fatih Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Ankara  
Eurasian J Med 2007; 39: 45-48

Key Words: Hand preference, Immune asymmetry, Neuropsychiatric disorder, Cerebral lateralization
Abstract

Cerebral lateralization is defined as the morphological and functional differences between two brain hemispheres. Hand preference is accepted as a functional cerebral latera lization. In most of the people, Wernicke's (posterior speech cortex) and Broca's areas (posterior speech cortex) are better developed in one hemisphere compared to the other. The better developed hemisphere is called as dominant hemisphere. The left hemisphere is the dominant one in 95% of the people. Hand preference is described as using the right or left hand for skilled activities such as writing, painting and using fork-knife tools. Hand preference is thought to be afected from the factors such as gender, genetics and intra uterine position. The significant relationship between hand preference and immune system or neuropsychiatric disorders was reported in many studies. Further studies on this subject can explain the physiopathology of a number of neuroen dcrine, neuroimmune and psychiatric disorders and, therefore, their treatment approaches will also be chanced.

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