The article presents a new understanding of the neurometabolic cascade following concussion, emphasizing the acute physiological changes and their link to clinical symptoms and long-term impairments. Concussion results in ionic flux and glutamate release, leading to energy crisis, mitochondrial dysfunction, and altered redox state. These changes are associated with migrainous symptoms, vulnerability to repeat injury, and cognitive impairment. Advanced neuroimaging allows noninvasive monitoring of post-concussion pathophysiology. The neurometabolic cascade involves bioenergetic challenges, cytoskeletal and axonal alterations, and impairments in neurotransmission, contributing to delayed cell death and chronic dysfunction. Cytoskeletal damage and axonal dysfunction are significant, with axons being particularly vulnerable to biomechanical stretch. Early studies show increased axolemmal permeability after TBI, and axonal disconnection can occur without cell death. Altered neurotransmission, including changes in glutamate receptor subunits and GABAergic function, contributes to cognitive and behavioral impairments. Inflammation is also implicated, with microglial activation and cytokine upregulation following TBI. Cell death is minimal in mild TBI, but repeated injuries can lead to chronic structural changes and persistent impairments. The connection between acute pathophysiology and clinical symptoms is being explored, with findings suggesting links between ionic flux and migraine, energy crisis and vulnerability, and axonal dysfunction and slowed cognition. Chronic sequelae of repeated mild TBI, such as chronic traumatic encephalopathy (CTE), are associated with pathological changes like tau protein aggregation. The mechanisms of chronic axonal dysfunction, including protease activation and toxic protein accumulation, are being studied. The article highlights the importance of understanding these processes to develop better prevention strategies and treatments for concussion and its long-term effects.The article presents a new understanding of the neurometabolic cascade following concussion, emphasizing the acute physiological changes and their link to clinical symptoms and long-term impairments. Concussion results in ionic flux and glutamate release, leading to energy crisis, mitochondrial dysfunction, and altered redox state. These changes are associated with migrainous symptoms, vulnerability to repeat injury, and cognitive impairment. Advanced neuroimaging allows noninvasive monitoring of post-concussion pathophysiology. The neurometabolic cascade involves bioenergetic challenges, cytoskeletal and axonal alterations, and impairments in neurotransmission, contributing to delayed cell death and chronic dysfunction. Cytoskeletal damage and axonal dysfunction are significant, with axons being particularly vulnerable to biomechanical stretch. Early studies show increased axolemmal permeability after TBI, and axonal disconnection can occur without cell death. Altered neurotransmission, including changes in glutamate receptor subunits and GABAergic function, contributes to cognitive and behavioral impairments. Inflammation is also implicated, with microglial activation and cytokine upregulation following TBI. Cell death is minimal in mild TBI, but repeated injuries can lead to chronic structural changes and persistent impairments. The connection between acute pathophysiology and clinical symptoms is being explored, with findings suggesting links between ionic flux and migraine, energy crisis and vulnerability, and axonal dysfunction and slowed cognition. Chronic sequelae of repeated mild TBI, such as chronic traumatic encephalopathy (CTE), are associated with pathological changes like tau protein aggregation. The mechanisms of chronic axonal dysfunction, including protease activation and toxic protein accumulation, are being studied. The article highlights the importance of understanding these processes to develop better prevention strategies and treatments for concussion and its long-term effects.