Audio LecturePro Feature Extensor Digiti Minimi 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The extensor digiti minimi is a muscle within the superficial compartment of the posterior forearm. The tendon of the extensor digiti minimi passes through the 5th extensor compartment at the wrist. Attachments: Originates from the lateral epicondyle of the humerus. It attaches into the extensor hood of the little finger. Actions: Extension of the little finger, and weak extensor at the wrist. Innervation: Radial nerve (deep branch). Blood supply: Radial artery By TeachMeSeries Ltd (2026) Fig 1The muscles in the superficial layer of the posterior forearm. 3D ModelPro Feature You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Dissection AtlasPro Feature Prosection of the superficial layer of muscles within the posterior compartment of the forearm. Prosection of the superficial layer of muscles within the posterior compartment of the forearm. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More In gratitude to our body donorsLearn more In gratitude to our body donors We are deeply grateful to the individuals who chose to donate their bodies for the advancement of medical education. Their generosity makes these images possible and provides students and healthcare professionals with an invaluable opportunity to study human anatomy. We recognise the profound contribution made by each donor and their families, and we use these images with the dignity and respect their gift deserves. Acknowledge Frequent questions What is the extensor digiti minimi? The extensor digiti minimi is a muscle located in the superficial compartment of the posterior forearm. It is primarily responsible for extending the little finger and contributes weakly to wrist extension. Where does the extensor digiti minimi originate? This muscle originates from the lateral epicondyle of the humerus. Its strategic location allows it to effectively facilitate movement of the little finger. What is the function of the extensor digiti minimi? The main function of the extensor digiti minimi is to extend the little finger. It also provides a weak extension of the wrist, assisting in hand movements. How is the extensor digiti minimi innervated? The extensor digiti minimi is innervated by the deep branch of the radial nerve. This innervation is crucial for the muscle's ability to perform its functions effectively. What is the blood supply to the extensor digiti minimi? The blood supply to the extensor digiti minimi is provided by the radial artery. This vascular supply is essential for the muscle's health and function. Rate This Article