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Examination Of S1 Nerve Root

Courtesy: Prof Nabil Ebraheim, University of Toledo, Ohio, USA

 

EXAMINATION OF S1 NERVE ROOT

  1. SENSORY EXAMINATION
  2. REFLEXES
  3. MOTOR EXAMINATION

SENSORY EXAMINATION

  • Checking sensation in the dermatomal distribution of the S1 nerve, which includes lateral aspect of foot.

REFLEX EXAMINATION

  • Testing the ankle reflex (Achilles reflex), which is primarily innervated by the S1 nerve root.

MOTOR SYSTEM EXAMINATION

  • Testing strength and muscle bulk of the muscles innervated by the S1 nerve root,

MUSCLES INNERVATED BY S1

  1. Peroneus Longus & Brevis
  2. Flexor Hallucis Longus
  3. Gastrocnemius
  4. Lateral Hamstrings
  5. Gluteus Maximus

 

A patient with a herniated disc at L5 – S1, (affecting the S1 nerve root) may find sharp waves or fibrillations.

A posterolateral herniated disc at L5 – S1 clearly causes S1 nerve root irritation

A foraminal herniated disc at L5 – S1 will cause L5 radiculopathy.

Post Views: 4,189

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  • Anatomy of L5 nerve Root

    Courtesy: Prof Nabile Ebraheim, University of Toledo, Ohio, USA

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Get Book Kendall’s Muscles: Testing and Function, with Posture and Pain, 6th Edition, transforms this landmark Physical Therapy classic to prepare you for unparalleled clinical success in today’s practice. Timeless coverage of manual muscle testing, evaluation, and treatment meets the latest evidence-based practices, engaging imagery, and dynamic digital resources to create a powerful resource you […]

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