Two types of tetanus
Physiologic: when holding something
Pathologic: spastic involuntary spasms
Summation
Barely a relaxation moment between two contractions
Incomplete Tetanus
Split second of relaxation between two contractions
Complete Tetanus
No relaxation between two contractions
How does tetanus happen?
Initial AP causes influx of Calcium
Second AP is reached during high concentration of Calcium causing a contraction