In we humans, (leaving aside the knee jerk and other such jerks), most responses involve a longer CIRCUIT with numerous SYNAPSES and NEURONS arranged in series and in parallel.
Our big brains help accommodate this expanded synaptic bridge that links SENSATION to ACTION. Thus, bigger and more evolved the brain, more the number of neurons and connections and hence more the repertoire of available responses.
Although the total number of NEURONS is, more or less, fixed at our birth, we can always form new and numerous CONNECTIONS/SYNAPSES to improve our brain’s processing capacity. In other words, we can upgrade our hardware (brain connections/synapses) for newer software (behavioural responses)
Apollo Hospitals154/11, Opposite IIM-B, BG RoadBengaluru, Karnataka.India - 560076.
Kartik's NeuroSpine Clinic857, 5th main, 3rd Cross, Vishnu SmritiVijaya Bank Layout, Behind Cáfe Coffee day, BilekahalliBengaluru, Karnataka India - 560076
Mathru Multi Speciality Hospital#32, 2nd Cross, Manjunatha Nagar, Behind Adigas, Near A2BKanakapura Main Road, RaghuvanahalliBengaluru, Karnataka India - 560062