Subauricular papillary muscle
Musculus papillaris subauricularis
- Latin synonym: Musculus papillaris anterior ventriculi sinistri
- Synonym: Anterior papillary muscle of left ventricle
Definition
The subauricular papillary muscle (also identified as "anterior papillary muscle" by human nomenclature) arise near the cranial septal wall of LV and lies near the subsinuosal interventricular groove.
The two large papillary muscles (musculi papillares) of the left ventricle are thick, smooth rolls of myocardium, coming from the LV outer wall which have compound apices and give rise to the stout chordae tendineae of this chamber. The subatrial papillary muscle (musculus papillaris subatrialis) is closer to the paraconal interventricular groove than the subauricular papillary muscle (musculus papillaris subauricularis).
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