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Fig. 4 | SpringerPlus

Fig. 4

From: A framework for the first-person internal sensation of visual perception in mammals and a comparable circuitry for olfactory perception in Drosophila

Fig. 4

Diagram showing a mechanism for the formation of basic unit of perception. Stimulus1 and Stimulus2 arriving from infinitesimally close locations from an object simultaneously activate the inter-postsynaptic functional LINK from the opposite sides resulting in the simultaneous formation of Semblion1 and Semblion2 respectively. Stimulus1 activates the sensory receptor set {srp1} and this activity results in the activation of neuron N1 resulting in activation of the synapse AB. This results in the activation of the inter-postsynaptic functional LINK BD evoking a unit of semblance labeled Semblion1 from the receptor set {sr1}. Similarly, Stimulus2 activates the sensory receptor set {srp2} and activity results in activation of the neuron N2 resulting in the activation of the synapse CD. This results in the activation of the inter-postsynaptic functional LINK B-D evoking a unit of semblance labeled Semblion2 from the receptor set {sr2}. Note that the semblance induced by one stimulus matches the other stimulus. This simultaneous formation of overlapping stimulus-semblance U-loops in opposite directions across the inter-postsynaptic functional LINK B-D is hypothesized to form the basic units of perception. Interruption of the formation of stimulus-semblance U-loops due to lack of sensory stimulus beyond the edges breaks the continuity in the formation of percept from the surface of the object. Simultaneous formation of stimulus-semblion U-loops arriving from a different plane provides percept of the scenery beyond the edges of the object. The neuronal paths through which stimulus reach the inter-postsynaptic functional LINK is given in blue and green. The neuronal paths through which extrapolation from the postsynapses up to the sensory receptors is carried out to estimate the semblance also include neurons and sensory receptors that are given in violet color. The directions of the stimuli and semblances are opposite to each other. Note that for simplicity, the semblions are drawn to a single point in contrast to their expected spanning over several sensory receptors as in the original derivation (Vadakkan 2013) and shown in Fig. 3 above. The overlapping of perceptons with that of the origin of sensory stimuli from the object occurs only for a limited distance from the eye. w Waveform in front of the inter-postsynaptic junction represents the oscillating surface- or extracellular-recorded potentials whose horizontal component has contributions from the spread of activity through the inter-postsynaptic functional LINK BD

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