第6回国際スポーツ脳振盪会議の共同声明

“Sport-related concussion is a traumatic brain injury caused by a direct blow to the head, neck or body resulting in an impulsive force being transmitted to the brain that occurs in sports and exercise-related activities. This initiates a neurotransmitter and metabolic cascade, with possible axonal injury, blood flow change and inflammation affecting the brain. Symptoms and signs may present immediately, or evolve over minutes or hours, and commonly resolve within days, but may be prolonged.

No abnormality is seen on standard structural neuroimaging studies (computed tomography or magnetic resonance imaging T1- and T2-weighted images), but in the research setting, abnormalities may be present on functional, blood flow or metabolic imaging studies. Sport-related concussion results in a range of clinical symptoms and signs that may or may not involve loss of consciousness. The clinical symptoms and signs of concussion cannot be explained solely by (but may occur concomitantly with) drug, alcohol, or medication use, other injuries (such as cervical injuries, peripheral vestibular dysfunction) or other comorbidities (such as psychological factors or coexisting medical conditions).“（参照資料１）

“Sport-related concussion is a traumatic brain injury caused by a direct blow to the head, neck or body resulting in an impulsive force being transmitted to the brain that occurs in sports and exercise-related activities.

「スポーツ関連脳振盪はスポーツや運動活動中に起きる頭頸部や体への直接の打撃が衝撃力となって脳に伝わることで起きる外傷性脳損傷です」

This initiates a neurotransmitter and metabolic cascade, with possible axonal injury, blood flow change and inflammation affecting the brain.

「これによって神経伝達物質や代謝物質のカスケードを引き起こし、また軸索損傷、血流の変化、炎症が脳に影響を与える場合もある」

Symptoms and signs may present immediately, or evolve over minutes or hours, and commonly resolve within days, but may be prolonged.

「症状と兆候はすぐに現れることもあれば、数分後から数時間後に発生することもあり、それらは一般的に数日で解消するが遷延することもある」

No abnormality is seen on standard structural neuroimaging studies (computed tomography or magnetic resonance imaging T1- and T2-weighted images), but in the research setting, abnormalities may be present on functional, blood flow or metabolic imaging studies.

「一般的な神経画像検査（CTやMRI-T1やT2強調画像）で異常は見られないが、研究環境では機能的、血流、代謝画像で異常が見られることもある」

Sport-related concussion results in a range of clinical symptoms and signs that may or may not involve loss of consciousness.

「スポーツ関連脳震盪はさまざまな症状と兆候を引き起こし、それは意識消失を伴う場合もそうでない場合もある」

The clinical symptoms and signs of concussion cannot be explained solely by (but may occur concomitantly with) drug, alcohol, or medication use, other injuries (such as cervical injuries, peripheral vestibular dysfunction) or other comorbidities (such as psychological factors or coexisting medical conditions).“（参照資料１）

「脳振盪の症状と兆候は単に薬物、アルコール、内服薬、その他の怪我（例えば首の怪我や末梢前庭障害）、または他の併存疾患（例えば精神的な要素や併存する病的疾患）によって説明がつくものではない（ただし、同時に起こることはあり得る）」

“Sport related concussion is a traumatic brain injury induced by biomechanical forces. Several common features that may be utilised in clinically defining the nature of a concussive head injury include:

►  SRC may be caused either by a direct blow to the head, face, neck or elsewhere on the body with an impulsive force transmitted to the head.

►  SRC typically results in the rapid onset of short-lived impairment of neurological function that resolves spontaneously. However, in some cases, signs and symptoms evolve over a number of minutes to hours.

►  SRC may result in neuropathological changes, but the acute clinical signs and symptoms largely reflect a functional disturbance rather than a structural injury and, as such, no abnormality is seen on standard structural neuroimaging studies.

►  SRC results in a range of clinical signs and symptoms that may or may not involve loss of consciousness. Resolution of the clinical and cognitive features typically follows a sequential course. However, in some cases symptoms may be prolonged.

The clinical signs and symptoms cannot be explained by drug, alcohol, or medication use, other injuries (such as cervical injuries, peripheral vestibular dysfunction, etc) or other comorbidities (eg, psychological factors or coexisting medical conditions).”（参照資料２）