Green et al. (1999) related visual backward masking deficits in patients with schizophrenia to a failure to establish cortical oscillations in the gamma range.
Two of the masking conditions showed increased rates of decline in backward, compared to forward, masking.
If this attentional component becomes less robust with age, it would contribute to a steeper decline with age for backward, as compared to forward, masking.
Interactions of group by forward versus backward masking were not significant, suggesting that deficits in forward and backward masking were comparable.
In 4 of the patients, the presence of atrioventricular block was initially masked by the pre-excitation.
Even when the fundamental frequency is masked, it may be recovered from the pulse period and the surviving harmonics.
The sides of the chambers were masked with black tape so that only light from above reached the eyecups.
Male movie masks primarily deny physical ageing or diminished dominance ; the ever-young interior subjective becomes (or strives to become) the exterior.
