. "Innermost intercostal muscle"@en . "m_22" . "musculus intercostalis intimus"@en . . "12549384" . "The innermost intercostal muscle is a layer of intercostal muscles deep to the plane that contains the intercostal nerves and intercostal vessels and the internal intercostal muscles. These are divided into:transversus thoracis anteriorlylateral muscle slips laterally (which cross a single intercostal space)subcostalis posteriorly (which often cross more than one intercostal space)"@en . .