What's the difference between pessimal and pessimum?

Pessimal

Definition:

Example Sentences:

Definition:

Example Sentences:

(1) Variants of mechanism of the response paradoxical weakening at the stimuli increase in conditions of parabiosis and pessimum of the neuro-muscular preparation, are regarded.
(2) The data obtained point out to participation of the synaptic potassium functional feedback (FF) in the phenomena of postactivational potentiation and presynaptic pessimum in the neuromuscular synapse.
(3) A constant temperature gradient is obtained by the irigation in a pessimum position with the head flexed 30 degrees to the front.
(4) The discovery of the intensity of repetitive stimulation pessimum and of the paradoxical response to stregthening of stimuli in a parabiotic nerve, is presented in historical aspect.
(5) With further increase of current strength to 0.9-1.1 mA the stress-induced rise in corticosteroids reduces and Wedensky pessimum is observed.
(6) There exist optimum and pessimum for learning PRCR values at different regimes of reinforcement.