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Peroneus Tertius

Region

Origin & Insertion

['Origin: Distal anterior fibula', 'Insertion: Dorsal surface of base of 5th metatarsal']

Synergistic Muscles

['Tibialis anterior', 'EDL']

Joints

['Ankle']

Primary Actions

['Dorsiflexion', 'Eversion']

Nerve & Spinal Segment

Deep fibular (peroneal) nerve

Sacral plexus; L5–S1

Interesting

Absent in 5–17% of people. [Gray’s]

Reversal of Action

Lift tibia with fixed forefoot

Common Dysfunctions

Anterior shin pain, foot drop component

How to Stretch

Plantarflexion with inversion.

Trigger Points

How to Strengthen

DF and eversion drills.

Concentric Action

Dorsiflex and evert foot

Applications:

Important in anterior ankle control during walking

Eccentric Action

Control foot descent during gait

Isotonic Action

Toe lifts with eversion cue

Related Conditions

['Drop foot', 'Shin splints']

Isometric Action

Hold DF with slight eversion

Exercise Ideas

['Toe lifts', 'Band DF', 'Balance drills']

Related Blogs

Images

Videos

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