Strayer's 1950 paper describes a new posterior midcalf surgical technique for spastic equinus contracture in children with cerebral palsy. It reports outcomes in 8 consecutive cases and provides a neurophysiological rationale for why selectively releasing the biarticular gastrocnemius produces effects beyond simple ankle correction. This paper established gastrocnemius recession as a procedure distinct from Achilles tendon lengthening.
When you see a cerebral palsy patient walking on tiptoe with heels off the floor, the Silfverskjöld test tells you which structure to release: if dorsiflexion is possible with the knee flexed but not with the knee extended, the gastrocnemius is the culprit and the soleus is fine.
Strayer's paper is why we do a selective gastrocnemius recession rather than defaulting to Achilles tendon lengthening in this scenario. Lengthening the entire Achilles complex risks over-weakening the soleus and producing a calcaneal gait — the Strayer preserves soleus function entirely.
The unexpected finding that adductor spasm and scissor gait improved after recession (without any adductor surgery) established the concept that releasing a dominant spastic biarticular muscle can down-regulate global spinal extensor tone. A principle that shaped decades of cerebral palsy surgical planning.
The Strayer procedure remains in routine use today, extended beyond cerebral palsy to adult acquired gastrocnemius equinus, plantar fasciitis, and flatfoot reconstruction. Always guided by the same Silfverskjöld test Strayer cited from the 1923 paper.
Strayer's 1950 paper describes a new posterior midcalf surgical technique for spastic equinus contracture in children with cerebral palsy. It reports outcomes in 8 consecutive cases and provides a neurophysiological rationale for why selectively releasing the biarticular gastrocnemius produces effects beyond simple ankle correction. This paper established gastrocnemius recession as a procedure distinct from Achilles tendon lengthening.
When you see a cerebral palsy patient walking on tiptoe with heels off the floor, the Silfverskjöld test tells you which structure to release: if dorsiflexion is possible with the knee flexed but not with the knee extended, the gastrocnemius is the culprit and the soleus is fine.
Strayer's paper is why we do a selective gastrocnemius recession rather than defaulting to Achilles tendon lengthening in this scenario. Lengthening the entire Achilles complex risks over-weakening the soleus and producing a calcaneal gait — the Strayer preserves soleus function entirely.
The unexpected finding that adductor spasm and scissor gait improved after recession (without any adductor surgery) established the concept that releasing a dominant spastic biarticular muscle can down-regulate global spinal extensor tone. A principle that shaped decades of cerebral palsy surgical planning.
The Strayer procedure remains in routine use today, extended beyond cerebral palsy to adult acquired gastrocnemius equinus, plantar fasciitis, and flatfoot reconstruction. Always guided by the same Silfverskjöld test Strayer cited from the 1923 paper.