Is Being Plastic Fantastic? Mechanisms of Altered Plasticity after Developmental Traumatic Brain Injury

• Published in: Developmental neuroscience Vol. 28; no. 4-5; pp. 364 - 379
• Main Authors: Giza, Christopher C., Prins, Mayumi L.
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland S. Karger AG 01.01.2006
• Subjects: Aging - physiology; Animals; Basic Science Research; Brain - growth & development; Brain - metabolism; Brain - physiopathology; Brain Injuries - metabolism; Brain Injuries - physiopathology; Cell Differentiation - physiology; Gene Expression Regulation - physiology; Humans; Nerve Degeneration - etiology; Nerve Degeneration - physiopathology; Nerve Net - growth & development; Nerve Net - metabolism; Nerve Net - physiopathology; Nerve Tissue Proteins - analysis; Nerve Tissue Proteins - genetics; Nerve Tissue Proteins - metabolism; Neuronal Plasticity - physiology; Synaptic Transmission - physiology; Neurotransmitter; Pediatric traumatic brain injury; Experience-dependent plasticity; Head injury
• ISBN: 3805581653; 9783805581653
• ISSN: 0378-5866; 1421-9859
• DOI: 10.1159/000094163

Traumatic brain injury (TBI) is predominantly a clinical problem of young persons, resulting in chronic cognitive and behavioral deficits. Specifically, the physiological response to a diffuse biomechanical injury in a maturing brain can clearly alter normal neuroplasticity. To properly evaluate and investigate developmental TBI requires an understanding of normal principles of cerebral maturation, as well as a consideration of experience-dependent changes. Changes in neuroplasticity may occur through many age-specific processes, and our understanding of these responses at a basic neuroscience level is only beginning. In this article, we will particularly discuss mechanisms of TBI-induced altered developmental plasticity such as altered neurotransmission, distinct molecular responses, cell death, perturbations in neuronal connectivity, experience-dependent ‘good plasticity’ enhancements and chronic ‘bad plasticity’ sequelae. From this summary, we can conclude that ‘young is not always better’ and that the developing brain manifests several crucial vulnerabilities to TBI.