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Promoting cognitive and physical rest is central to managing a concussion in the emergency department because it is crucial for recovery from a traumatic brain injury. Rest helps to alleviate symptoms and allows the brain to heal from the effects of the concussion. After a concussion, patients are often advised to avoid activities that require significant cognitive effort, such as reading or using electronic devices, as well as physical exertion. This approach minimizes the risk of exacerbating symptoms and can help prevent further injury.

Additionally, while medications may be offered for pain relief, they are not the primary focus, as managing the patient's rest and recovery takes precedence. Surgical intervention is typically not warranted in the case of concussions unless there are specific indications of more severe brain injury, such as intracranial hemorrhage. Immediate imaging studies are useful in specific cases to rule out serious conditions, but these are not routinely required for all concussion cases. Thus, the emphasis on rest reflects the most effective strategy to support healing and is an integral aspect of concussion management.