Abductor Digiti Minimi – Anatomy, Nerve Supply, Function

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 3 min read
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Abductor Digiti Minimi (abductor minimi digit, abductor digiti quinti) is a muscle that lies along the lateral (outer) border of the foot and is in relation to its medial margin with the lateral plantar artery, vein, and nerves. Its homolog in the arm is the abductor digit...

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এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Abductor Digiti Minimi (abductor minimi digit, abductor digiti quinti) is a muscle that lies along the lateral (outer) border of the foot and is in relation to its medial margin with the lateral plantar artery, vein, and nerves. Its homolog in the arm is the abductor digit minimi muscle in the hand. Its homolog in the arm is the abductor digit minimi muscle in the hand. Abductor digiti...

Key Takeaways

  • This article explains Abductor Digiti Minimi in simple medical language.
  • This article explains Origin and Insertion in simple medical language.
  • This article explains Nerve Supply in simple medical language.
  • This article explains Blood Supply in simple medical language.
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Seek urgent medical care if you notice

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  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
1

Emergency now

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2

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3

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Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

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Definition

Abductor Digiti Minimi (abductor minimi digit, abductor digiti quinti) is a muscle that lies along the lateral (outer) border of the foot and is in relation to its medial margin with the lateral plantar artery, vein, and nerves. Its homolog in the arm is the abductor digit minimi muscle in the hand. Its homolog in the arm is the abductor digit minimi muscle in the hand.

Abductor digiti minimi is an unipennate muscle located in the lateral part of the sole of the foot.

As there are horizontal and vertical groupings of foot muscles into four layers and three groups respectively, the full address of this muscle is that it belongs to the;

  • First layer of plantar foot muscles, together with the abductor hallucis and flexor digitorum brevis
  • Lateral plantar muscles, along with the flexor digiti minimi brevis and opponens digiti minimi

Extending between the calcaneus and fifth digit, the function of abductor digiti minimi is to support the lateral longitudinal arch of the foot during walking and running by abducting the fifth toe.

Abductor Digiti Minimi

  • Origin: Calcaneal tuberosity
  • Insertion: Base of the fifth metatarsal
  • Action: Abduct the 5th digit
  • Blood Supply: Lateral plantar artery
  • Innervation: Lateral plantar nerve lateral plantar artery

Origin and Insertion

It arises, by a broad origin, from the lateral process of the tuberosity of the calcaneus, from the under surface of the calcaneus between the two processes of the tuberosity, from the forepart of the medial process, from the plantar aponeurosis, and from the intermuscular septum between it and the flexor digitorum brevis.[rx]

Its tendon, after gliding over a smooth facet on the under surface of the base of the fifth metatarsal bone, is inserted, with the flexor digiti quinti brevis, into the fibular side of the base of the first phalanx of the fifth toe.

Abductor digiti minimi muscle originates from the plantar aponeurosis, lateral and medial processes of calcaneal tuberosity and the area between them. It courses anteriorly through the lateral part of the foot, giving off a tendon that inserts to the base of proximal phalanx of 5th digit and 5th metatarsal bone.

The part of the muscle that inserts onto the 5th metatarsal is the one originating from the lateral process of calcaneal tuberosity. These fibers can sometimes form a separate muscle called the abductor ossis metatarsi digiti quinti.

Nerve Supply

  • The abductor digiti minimi is innervated by the lateral plantar nerve, a branch of the tibial nerve.
  • Abductor digiti minimi is innervated by the lateral plantar nerve (S1, S3), a branch of the tibial nerve.

Blood Supply

This muscle is supplied by the branches of lateral plantar artery; plantar metatarsal and plantar digital arteries to 5th digit.

Functions

  • Although called the abductor, besides abducting, this muscle is a much more powerful flexor of the fifth toe at its metatarsophalangeal joint.
  • Its function is analogous to that of the abductor hallucis muscle from the opposite side of the foot; it maintains the concavity of the foot by supporting the lateral longitudinal arch during walking, running and jumping.
  • Its function is flexion[rx] and abduction of the fifth (little) toe at the metatarsophalangeal joint.[rx][rx]

References

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Tests to discuss

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Safe first steps

  • Rest, drink safe water, and observe symptoms carefully.
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OTC medicine safety

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Avoid these mistakes

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Get urgent help if

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Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
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Care roadmap for: Abductor Digiti Minimi – Anatomy, Nerve Supply, Function

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

References

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