Intercostales Intimi
Chest & Trunk
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Deepest intercostal layer — separated from internal intercostals by the neurovascular bundle running in the intercostal groove, making it clinically relevant for rib injections.
Function
Assist forced expiration; stabilize intercostal spaces
Origin
Superior border of rib below
Insertion
Inferior border of rib above
Innervation
Intercostal nerves T1-T11