Eqinus gait

Reading File

Equinus gait is a walking pattern where the foot is plantarflexed (toes pointing down), so the heel does not contact the ground normally. It is caused by tightness or spasticity of the calf muscles (gastrocnemius/soleus), or weakness of the dorsiflexors.

Searching sources...

Finding Sources

Good results found. Let me read the key sections now.

Reading File

Finding Sources

Reading File

I now have sufficient information to give a thorough answer. Let me compile everything.

Equinus Gait

Definition

Equinus gait (also called toe-walking gait or foot drop in different contexts) is a pathological gait pattern in which the ankle remains in plantarflexion during the stance phase, preventing normal heel-strike. The foot is held in a "horse hoof" (equinus = horse in Latin) position - toes pointing downward.

Classification / Types

Equinus gait can be categorized by mechanism:

Type	Mechanism	Example Cause
Spastic/Dynamic	Overactive gastrocnemius-soleus (spasticity)	Cerebral palsy, stroke, TBI
Fixed/Structural	Contracture of Achilles tendon	Untreated spasticity, immobilization
Neurogenic (flaccid)	Weak/absent dorsiflexors (foot drop)	Peroneal nerve palsy, CMT, polio
Idiopathic	No identifiable neurologic cause	Habitual toe-walking in children

Common Causes

Neurological (upper motor neuron):

Cerebral palsy (CP) - most common cause in children; equinus is the most common foot deformity in CP, affecting ~70% of children. Spasticity of the gastrocnemius-soleus complex is the underlying driver. It worsens during growth spurts because the tibia outgrows the muscle-tendon unit.
Stroke / Acquired Brain Injury - dynamic ankle equinus is a major gait deviation. The goal is ankle stability at neutral during initial contact (IC) and floor clearance during swing.
Traumatic brain injury (TBI)

Neurological (lower motor neuron / peripheral):

Peroneal nerve palsy (foot drop - inability to dorsiflex)
Charcot-Marie-Tooth disease (progressive equinus + cavus deformity)
Poliomyelitis

Other:

Idiopathic toe-walking (children, often bilateral)
Post-immobilization contracture

Gait Pattern Analysis

In normal gait, the heel strikes first (initial contact), followed by foot-flat, then push-off at toe-off. In equinus gait:

Swing phase: reduced ankle dorsiflexion - the toes may drag (foot drop) OR the patient compensates with hip/knee hiking (steppage gait)
Initial contact: toe or forefoot strikes first instead of heel
Stance phase: the heel may never contact the ground (persistent toe-walking)

Associated gait patterns in CP:

Toe-walking (equinus): contracted heel cords; treated with AFO if passively correctable or surgery (gastrocnemius recession vs. Achilles tendon lengthening - ATL)
Crouched gait: hamstring contracture producing hip flexion + knee flexion + ankle equinus; requires multilevel lengthening; isolated heel cord lengthening worsens crouch
Stiff-knee gait: rectus femoris firing out of phase in spastic diplegia; treated with distal rectus transfer to hamstrings
Scissoring gait: hip adductor spasticity; treated with adductor release

Diagnosis

Clinical examination: passive ankle dorsiflexion with knee extended vs. flexed (Silfverskiold test) - distinguishes isolated gastrocnemius tightness from combined gastrocnemius-soleus tightness
Observational gait analysis: video-based assessment
3D computerized gait analysis with dynamic EMG and force-plate studies: the gold standard for preoperative planning in CP
Surgery is typically indicated when ankle dorsiflexion cannot reach neutral (kinematics change dramatically with <5° of maximal dorsiflexion)

Treatment

Non-operative

Modality	Role
Ankle-foot orthosis (AFO)	First-line; positions joints in proper plane, reduces spasticity reflex, decreases energy expenditure
Posterior leaf-spring orthosis	Specifically for excessive plantar flexion during swing phase
Stretching / physiotherapy	Maintains range of motion
Botulinum toxin A (BTX-A)	Reduces spasticity, delays surgery; effective in preventing equinus deformity in CP
Serial casting	Stretches contracture progressively
Night bracing	Prevents foot from assuming equinus position during sleep

For acquired brain injury (stroke/TBI): adjustable AFO with dorsiflexion and plantar-flexion stop at neutral is used during recovery, followed by rigid AFO at plateau.

Operative

Procedure	Indication
Gastrocnemius recession (Strayer/Vulpius)	Isolated gastrocnemius tightness (Silfverskiold positive); lower recurrence risk
Achilles tendon lengthening (ATL / TAL)	Combined gastrocnemius-soleus contracture
Percutaneous ATL	Dynamic equinus in acquired brain injury; overcomes orthosis holding power
Multilevel surgery	Crouched gait with equinus as component - correct hip, knee, and ankle simultaneously

Important surgical considerations:

Surgery generally performed at age 4-5 years in CP
Recurrence rate ranges 0-50% (study of 243 children: 11% at 10 years; higher in those <4 years)
Younger patients and hemiplegics most likely to recur
For dynamic varus component (out-of-phase tibialis anterior in stance): split or complete lateral transfer of tibialis anterior

Key Points to Remember

Equinus is the most common foot deformity in cerebral palsy (~70% of children)
Gastrocnemius-soleus spasticity is the driving force; worsens during rapid growth (tibial overgrowth)
Surgery indicated when ankle cannot reach neutral in an ambulatory child (<5° dorsiflexion)
AFO + BTX-A are first-line; delay or prevent surgery
Never do isolated ATL in crouched gait - it worsens the crouch
Gait analysis with dynamic EMG is essential before multilevel surgery in CP
Recurrence is higher in younger patients (especially <3 years) and hemiplegics

Sources: Miller's Review of Orthopaedics 9th Ed, p. 302 (Gait Disorders in CP); Campbell's Operative Orthopaedics 15th Ed 2026 (Equinus Deformity, Surgical Correction of Equinus Deformity, Lower Limb - Acquired Brain Injury)

This is a shared conversation. Sign in to Orris to start your own chat.