Journal of Brain Science and Mental Health
Bhaskareâs Neuroplastic ReserveâMaturity Model: A Conceptual Framework Linking Age, Neuroplastic Capacity, and Rehabilitation-Induced Adaptation
Abstract
Gautam Mangesh Bhaskare
Neuroplasticity, the nervous system’s capacity for adaptive structural and functional change, has become a unifying construct in neuroscience, neurology, and rehabilitation medicine. Yet the literature has not consistently reconciled two observations that appear, on their surface, to be in tension: plastic capacity is generally described as declining across the lifespan, while the neural mechanisms that instantiate plasticity become progressively more organized and specialized with maturation. This systematic review synthesizes evidence bearing on two theoretical constructs proposed by the author to resolve this tension, collectively termed Bhaskare’s Principles of Neuroplasticity: Bhaskare’s Principle I, the Neuroplastic Reserve Principle, describing the intrinsic, largely age-graded capacity of the nervous system for adaptive modification, and Bhaskare’s Principle II, the Neuroplastic Maturity Principle, describing the shift from broad, developmentally driven plasticity toward specialized, experience-dependent plasticity. A narrative-systematic search of PubMed, Google Scholar, and allied databases identified literature spanning developmental critical-period neuroscience, cognitive and brain reserve theory, synaptic aging and neurotrophic signaling, tumor-associated cortical reorganization, and dose-, timing-, and specificity-dependent principles of neurorehabilitation. Across these domains, converging evidence indicates that reserve and maturity are dissociable but interacting constructs, and that externally applied rehabilitation stimuli characterized by specificity, intensity, repetition, salience, appropriate timing, and sufficient sensory and motor engagement can recruit residual plastic capacity even in mature and aged nervous systems. These findings are integrated into a proposed Bhaskare’s Neuroplastic Reserve–Maturity Model, which frames functional recovery as the product of an interaction between a constrained but non-zero biological reserve, an increasingly specialized but organizationally efficient neural architecture, and a rehabilitation stimulus capable of directing residual capacity toward functionally meaningful reorganization. Clinical implications for stroke rehabilitation, traumatic brain injury, pediatric neurology, and neuro-oncological surgery are discussed, alongside the conceptual and methodological limitations of a framework that remains, at this stage, illustrative rather than empirically parameterized.