10. Head Injury/Concussion

Concussion

Historical Context
Quote by Hippocrates (460-377 BC): "No Head Injury is Too Trivial To Ignore."

Introduction to Concussions
Statistics on Causes of Head Injuries:

Falls: 28%
Struck by/against (including sports): 19%
Other causes (including suicide): 22%
Motor Vehicle Accidents (MVAs): 20%
Assault: 11%
Source: National Centre for Injury Prevention And Control - CDC
Definition of Sport-Related Concussion:
A traumatic brain injury induced by biomechanical forces, characterized by a rapid onset of short-lived neurological impairment that typically resolves spontaneously within a few days.
Some cases may experience evolving symptoms over minutes to hours, requiring careful observation for health professionals.
Source: Consensus statement on concussion in sport — the 5th international conference on concussion in sport held in Berlin, October 2016.
History of the Term:
The term "Concussion" dates back to the 1400s, denoting bruising or contusion of the head, historically recognized as a significant concern in the medical field.
Most concussions resolve in 7-14 days; neural imaging is usually normal without hemorrhage or fracture, highlighting the often invisible nature of this injury.
Serious Head Injuries:
Some head injuries can lead to vascular and metabolic complications, resulting in long-term effects such as chronic headaches, cognitive deficits, or emotional disturbances. Awareness of these potential consequences is essential for healthcare practitioners and patients alike.
Concussion in Sports:
While concussions have been a known risk in sports for years, recent research has shed light on the potential long-term consequences of repeated brain injuries, raising awareness among athletes, coaches, and medical professionals. The dialogue surrounding concussion protocols in professional sports has also gained traction in media coverage and public conscience.
Important Note: An athlete does not need to be knocked unconscious to suffer from a sport-related concussion, challenging common misconceptions about the severity of impacts in sports.

Mechanism of Injury
Causes of Sport-Related Concussion:
Can result from direct blows to the head, face, neck, or impacts elsewhere that transmit impulsive forces to the head, making it crucial for athletes and trainers to recognize potential risks during practice and competition.
Source: Consensus statement on concussion in sport — the 5th international conference on concussion in sport held in Berlin, October 2016.
Types of Injury:

Coup Injury: Brain injury occurs at the impact site caused by a direct blow/force to the head, often seen during contact sports.
Contrecoup Injury: Brain injury occurs opposite the impact site, typically from indirect forces such as whiplash or falls, representing a significant concern in assessing athletes post-injury.
The coup-contrecoup pattern represents the most common mechanism seen in sports, and understanding this can aid in diagnostic processes following head impacts.

Signs and Symptoms of Concussion
Signs and symptoms vary widely with trauma location and severity and can manifest immediately or be delayed:

Immediate Symptoms: Significant swelling or arterial bleed, requiring urgent medical evaluation.
Delayed Symptoms: Slow swelling or venous bleed, which may not appear for hours or days, necessitating ongoing monitoring of the individual.
Clinical Domains of Suspected Concussion:
Symptoms:
- Somatic (e.g., headache)
- Cognitive (e.g., feeling "foggy")
- Emotional (e.g., rapid mood swings, depression)
Physical Signs:
- Loss of consciousness
- Amnesia (temporary loss of memory)
- Neurological deficits (motor weakness or sensory changes)
Balance Impairment:
- Issues with gait and stability, which can pose risks for secondary injuries.
Behavioral Changes:
- Increased irritability or apathy, signaling emotional distress.
Cognitive Impairment:
- Slowed reaction times, which may hinder performance in academic or athletic settings.
Sleep Disturbances:
- Somnolence and drowsiness, indicating potential neurological involvement.
  Source: Consensus statement on concussion in sport — the 5th international conference on concussion in sport held in Berlin, October 2016.
  Areas for Assessment:
  Vestibular, Somatosensory, Linguistic, Autonomic, Ocular, Neurological, Anxiety, Attention, Fatigue, Cognition, and Neck are critical areas that must be evaluated to ensure holistic management of concussion.

Concussion Recognition Tool (CRT6)
Purpose: To assist in recognizing concussions in all age groups, ensuring timely and appropriate management.

Visible Clues:
- Loss of consciousness
- Lying motionless
- Confusion or disorientation
- Facial injuries indicative of trauma.
Symptoms:
- Headache
- Balance problems
- Nausea
- Drowsiness
- Sensitivity to light/noise, which are critical for accurate assessment.
Awareness Questions:
Questions about current event awareness can help assess memory and cognitive function, vital for determining the severity of the injury.
Emergency Procedures:
If any red flags arise (e.g., loss of consciousness, severe headache), immediate medical assistance should be sought to prevent further complications.
Athletes suspected of concussion should be removed from play immediately, demonstrating a commitment to health and safety.

Recovery and Management
Cumulative Nature of Concussions:
Risks increase significantly with premature return to play, underscoring the need for cautious management and following protocols.
Recovery varies from complete to partial, ranging from days to weeks, and ensuring rest is crucial for recovery.
Management Protocol:
Players demonstrating signs of concussion should NOT return to play on the same day and require thorough medical evaluations; monitoring for symptoms is essential.
Players must not engage in any activities posing risk until cleared medically; clear communication between healthcare providers and athletes is paramount.
A minimum of 24 hours is required before progression to return to play protocols, highlighting the need for a structured approach to management and recovery.