This is not a reference to the AISB convention (and I know because I was the last one to chair it - it is a UK annual event on Artificial Intelligence, and unlikely to be referred to in this context). The source text has collapsed a reference to the 'ASIA' (see below) scale with one of its grades, namely, 'B'.

"The American Spinal Injury Association (ASIA) first published an international classification of spinal cord injury in 1982, called the International Standards for Neurological and Functional Classification of Spinal Cord Injury. Now in its sixth edition, the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) is still widely used to document sensory and motor impairments following SCI.[4] It is based on neurological responses, touch and pinprick sensations tested in each dermatome, and strength of ten key muscles on each side of the body, including hip flexion (L2), shoulder shrug (C4), elbow flexion (C5), wrist extension (C6), and elbow extension (C7).[5] Traumatic spinal cord injury is classified into five categories on the ASIA Impairment Scale:
A indicates a "complete" spinal cord injury where no motor or sensory function is preserved in the sacral segments S4-S5.
B indicates an "incomplete" spinal cord injury where sensory but not motor function is preserved below the neurological level and includes the sacral segments S4-S5. This is typically a transient phase and if the person recovers any motor function below the neurological level, that person essentially becomes a motor incomplete, i.e. ASIA C or D." (Quoted from the Wikipedia URL below)

This is not a reference to the AISB convention (and I know because I was the last one to chair it - it is a UK annual event on Artificial Intelligence, and unlikely to be referred to in this context). The source text has collapsed a reference to the 'ASIA' (see below) scale with one of its grades, namely, 'B'.

"The American Spinal Injury Association (ASIA) first published an international classification of spinal cord injury in 1982, called the International Standards for Neurological and Functional Classification of Spinal Cord Injury. Now in its sixth edition, the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) is still widely used to document sensory and motor impairments following SCI.[4] It is based on neurological responses, touch and pinprick sensations tested in each dermatome, and strength of ten key muscles on each side of the body, including hip flexion (L2), shoulder shrug (C4), elbow flexion (C5), wrist extension (C6), and elbow extension (C7).[5] Traumatic spinal cord injury is classified into five categories on the ASIA Impairment Scale:
A indicates a "complete" spinal cord injury where no motor or sensory function is preserved in the sacral segments S4-S5.
B indicates an "incomplete" spinal cord injury where sensory but not motor function is preserved below the neurological level and includes the sacral segments S4-S5. This is typically a transient phase and if the person recovers any motor function below the neurological level, that person essentially becomes a motor incomplete, i.e. ASIA C or D." (Quoted from the Wikipedia URL below)