Great post from @doctor_kickass.
🧠Concussions are mild traumatic brain injuries that result from acceleration of the brain that create shearing forces.
✅There are two phases: excitatory and spreading depression.
1️⃣Excitatory: The initial phase includes many typical concussion symptoms: loss of consciousness, headache, concussion, brain fog, daze, fatigue, slurred spree has, nausea, dizziness and vomiting.
2️⃣Spreading Depression: Drop in brain chemical production. N-Acetylaspartate (NAA) is considered a neuron-specific metabolite and its reduction a marker of neuronal loss (Signoretti 2001).
💥In the second phase the brain is still vulnerable to injury even against mild impacts. Additional impact can result in a more severe brain injury.
➡️How long does this second phase last? Most people would assume once symptoms have ceased they are ready for a return to training, however brain chemicals may not normalize until day 30 (Vagnozzi 2010).
🗣Interested in learning more about concussion? Checkout these great accounts: @mollyparkerpt
📚Vagnozzi R, et al. Assessment of metabolic brain damage and recovery following mild traumatic brain injury: a multicentre, proton magnetic resonance spectroscopic study in concussed patients. Brain. 2010.
📚Signoretti S, et al. N-Acetylaspartate reduction as a measure of injury severity and mitochondrial dysfunction following diffuse traumatic brain injury. J Neurotrauma. 2001.