innermost intercostal muscle

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in·ner·most in·ter·cos·tal muscle

(in'ĕr-mōst in'tĕr-kos'tăl mŭs'ĕl)
Flat muscle of thorax that occurs as a layer parallel to and is essentially part of internal intercostal muscle but separated from it by intercostal vessels and nerves.
Synonym(s): musculus intercostalis intimus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Considering the mechanism of action they suggested that the local anaesthetic solution diffuses from the pleural space through the parietal pleura and innermost intercostal muscles to reach the intercostal space, where local anaesthetic causes blockade of intercostal nerves.