Relationships between middle latency auditory responses (MLR) and speech discrimination tests in the elderly

Abstract

Paludetti G, Maurizi M, D'Alatri L, Galli J. Relationships between middle latency auditory responses (MLR) and speech discrimination tests in the elderly. Acta Otolaryngol (Stockh) 1991; Suppl. 476: 105—109.

74 subjects aged between 60 and 80 years underwent tonal audiometry, speech discrimination tests (phonetically balanced words, normal sentences and compressed sentences) and middle latency responses (MLRs) in order to evaluate possible correlations between behavioural and electrophysiological tests. The results showed that in elderly patients normal sentences are better understood than phonetically balanced words, that performances decrease dramatically when listening conditions became difficult, that auditory threshold seems to influence speech discrimination scores more than does age per se. MLRs seem to be unaffected both by age and by auditory threshold and Pa occurrence is a more reliable parameter than its latency. No correlation between speech discrimination tests and MLRs could be observed; on the contrary in the presence of abnormal speech discrimination tests the MLRs were almost normal and vice versa.

Key Words:

• middle latency responses
• speech discrimination tests
• aged population