Innermost intercostal

Definition

The innermost intercostals are muscles located deep within the ribcage, specifically between the ribs, and play a crucial role in facilitating breathing by aiding in the contraction and expansion of the chest. They are part of a group of three intercostal muscle layers that contribute to the mechanical aspect of breathing.

Related terms

External Intercostals: These muscles are situated just outside the innermost intercostals and primarily assist with elevating the ribs during inhalation.

Internal Intercostals: Located between the external and innermost intercostal muscles, these muscles aid in forced exhalation by depressing the ribs.

Diaphragm: A major muscle located beneath the lungs that plays an essential role in breathing by contracting and flattening to enlarge the thoracic cavity during inhalation