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Quadratus plantae

Region

Origin & Insertion

['Origin: Calcaneus (medial and lateral heads)', 'Insertion: Posterolateral margin of FDL tendon']

Synergistic Muscles

['FHL', 'FDB']

Joints

['Toes 2–5']

Primary Actions

['Assists flexor digitorum longus in toe flexion']

Nerve & Spinal Segment

Lateral plantar nerve

Sacral plexus; S1–S3

Interesting

Redirects pull of FDL. [Clinically Oriented Anatomy]

Reversal of Action

Stabilize midfoot during push-off

Common Dysfunctions

Toe pull deviation, foot cramping

How to Stretch

Toe extension and dorsiflexion.

Trigger Points

How to Strengthen

Toe press with heel rise.

Concentric Action

Redirect pull of FDL, assist toe flexion

Applications:

Corrects toe trajectory in toe gripping drills and claw toe therapy

Eccentric Action

Control flexion path of lateral toes

Isotonic Action

Toe curl with neuromuscular cueing

Related Conditions

['Flat feet', 'Plantar fasciitis']

Isometric Action

Hold toe flexed under guided path

Exercise Ideas

['Towel curls', 'Short foot with toes', 'FDL band flexion']

Related Blogs

Images

Videos

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