July 2, 2013 If you rely on hands gestures to really get your point across, you are able to thank catch that! Scientists have found that the evolution of the control of conversation and hand movements can be traced to the same place in the mind, that could explain why we all use hand gestures when we are speaking.
Professor Andrew Striped bass (Cornell University), that will be presenting their work at the meeting of the Society with regard to Experimental Biology on the 3rd July, said: “ We have traced the evolutionary origins of the behavioural coupling among speech and hand movement back to a developmental compartment in the human brain of fishes. ”
“ Chest appendages (fins and forelimbs) are mainly utilized for locomotion. Still pectoral appendages additionally function in social transmission for the purposes of making sounds that people simply make reference to as non-vocal sonic signals, and for gestural signalling. ”
Studies of early development in fishes show that neural networks in the human brain controlling the more complex vocal and pectoral mechanisms of social signalling among birds and mammals have their our ancestors origins in one compartment of the hindbrain in fishes. This starts to explain the our ancestors origins of the neural basis for the close coupling between vocal and pectoral/gestural signalling that is observed among numerous vertebrate groups, such as humans.
Professor Bass said: “ Coupling of vocal and pectoral-gestural circuitry begins to get at the actual evolutionary origins of the coupling among vocalization (speech) and gestural signalling (hand movements). This really is part and parcel of the maybe even larger story regarding language development. ”