Naslov
The development of intelligence and dermatoglyphics during the ascent of man

Autori
Cesarik, Marijan ; Lukić Cesarik, Branka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Neurol Croat 1995 44 suppl 1 / - , 1995, 60-61

Skup
35th INTERNATIONAI NEUROPSYCHIATRIC SYIVIPOSIUM

Mjesto i datum
Pula, Hrvatska, 14.06.1995. - 17.06.1995

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Dermatoglyphics

Sažetak
Dermatoglyphics are highly hereditary characteristics, the evolution of which is "only" 70 million years old. They appeared simultaneously with the advent of more intelligent beings - lower primates, like the insectivore lemur and the herbivore tupaya. The dermatoglyphics are found in all pri- mates. Described are the relations of the so- called "primitive samples" and the level of phylogenetic development of various primates, while the identical forms could be found in the dermatoglyphic embryogenesis in man, what represents the repetition of phylogenesis in ontogenesis. Phyiogenetically dermatoglyphics appear with the advent of more intelligent beings. Embryogenetically with the development of the nervous system on the periphery are formed epidermal ridges. The dermatoglyphics develop from the epidermal volar cushions which occur as the elevation of the mesenchymal tissue. Similar cushions are found on the fore limbs of the primate tupaya and the tarsier. During further evolution in monkeys we find completely developed dermatoglyphics. In man dermatoglyphics develop from the 12th to 20th gestational week, and the then formed shape remains unchanged the whole life. The hand and head are the moving tools of man's evolution. The proof of this is also the telencephalon cortex surface in the precentral convolution, on which are represented the hand (particularly the thumb) and the head (particularly the mouth). In man we can find “atavisms” of the dermatoglyphic evolution. This is in the first place the monkey convolution (the four fingers' convolution) characteristic for Down's syndrome (trisomy 21). The large atd-angle (more than 56CI) is frequent in Down's syndrome and other syndromes accompanied by mental retardation. In insufficient mental development and other conditions of retardation we find the decrease in the total ridge count, particularly of the palmar localization. On the contrary, in superior intelligence the atd-angle is smaller, and the total ridge count is increased. The values of rigde count on the first and the fifth finger on both sides in men, and on the first finger in women are increased. Regarding the presented connection of the head and hand development (the intelligence and dermatoglyphics) during the evolution (ascent). of man, we can assume that this longterm continuous dermatoglyphic development towards the quantitatively larger count of ridges is the milestone of evolution towards the successive increase in intelligence. This fact shows the necessity of further investigations of these phenomena on a larger number of examinees in all categories of intelligence.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

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