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Flexor Digitorum Brevis

Region

Origin & Insertion

['Origin: Calcaneal tuberosity and plantar aponeurosis', 'Insertion: Middle phalanges of toes 2–5']

Synergistic Muscles

['Flexor digitorum longus']

Joints

['Toes 2–5']

Primary Actions

['Flexes toes 2–5 at PIP joints']

Nerve & Spinal Segment

Medial plantar nerve

Sacral plexus; S1–S2

Interesting

Lies just beneath plantar fascia. [Gray’s]

Reversal of Action

Pull metatarsals toward toes in closed chain

Common Dysfunctions

Poor toe grip, foot fatigue

How to Stretch

Toe extension with dorsiflexion.

Trigger Points

How to Strengthen

Toe press with towel resistance.

Concentric Action

Flex toes 2–5 at PIP joints

Applications:

Vital for toe grip and intrinsic arch support

Eccentric Action

Control toe extension

Isotonic Action

Marble pick-up, towel scrunches

Related Conditions

['Plantar fasciitis', 'Hammer toes']

Isometric Action

Hold toes in mid-flexion

Exercise Ideas

['Towel scrunches', 'Short foot drill', 'Toe isometrics']

Related Blogs

Images

Videos

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