Assessment of the influence of cognition and cognitive processing speed on three tests of olfaction.

The extent to which measures of working memory, cognitive speed, and verbal retrieval are associated with performance on tests of olfaction was evaluated in a sample of 138 older adults. Structural equation modeling techniques indicated that verbal retrieval difficulties significantly affect performance on the University of Pennsylvania Smell Identification Test (UPSIT). Further, poor working memory and slow cognitive speed significantly affect performance on the UPSIT and the phenyl ethyl alcohol threshold test.

Characterization of the sniff magnitude test.

Objective: To evaluate the potential utility of the Sniff Magnitude Test (SMT) as a clinical measure of olfactory function.

Design: Between-subject designs were used to compare the SMT and University of Pennsylvania Smell Identification Test (UPSIT) in study participants from a broad range of ages.

Subjects: A total of 361 individuals from retirement communities and an urban university and patients from an otolaryngology clinic.

Neuronal chloride accumulation in olfactory epithelium of mice lacking NKCC1.

When stimulated with odorants, olfactory receptor neurons (ORNs) produce a depolarizing receptor current. In isolated ORNs, much of this current is caused by an efflux of Cl-. This implies that the neurons have one or more mechanisms for accumulating cytoplasmic Cl- at rest.

A comparison of the sniff magnitude test and the University of Pennsylvania Smell Identification Test in children and nonnative English speakers.

The sniff magnitude test (SMT) is a reliable and rapid clinical test of olfactory function that is minimally dependent on cognitive and linguistic abilities. In this study, we compared performance on the SMT and University of Pennsylvania Smell Identification Test (UPSIT) in samples of children and nonnative English speakers. Previous research has shown that these populations perform poorly on the UPSIT as compared with young, healthy U.

Assessment of the Sniff Magnitude Test as a clinical test of olfactory function.

Olfactory threshold and odor identification tasks currently serve as the standard approaches to the clinical assessment of olfactory function. Although these methods can be used effectively with the average patient, they suffer from some limitations when used to evaluate children, people with cognitive impairment, or people from diverse cultural backgrounds. A novel approach to the clinical evaluation of olfactory function, the Sniff Magnitude Test, attempts to minimize the cognitive demands of an olfactory test and thereby overcome some of the limitations of alternative tests.