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Is the phoenix sign phenomenon due to vasodilation? A double-blinded, randomized controlled trial comparing motor function recovery after diagnostic common fibular nerve block with lidocaine and papaverine.
BMC Musculoskelet Disord
October 2024
NE Wyoming Wound Care Clinic, Sheridan, WY, USA.
Article Synopsis
- Focal entrapment of the common fibular nerve (CFN) is a common issue in the lower body that can be hard to diagnose, with a temporary strengthening response known as the "Phoenix sign" sometimes observed after lidocaine blocks.
- A study involving 20 patients tested the effects of two vasodilating agents, lidocaine and papaverine, on improving muscle strength in the anterior compartment by measuring the extensor hallucis longus (EHL) muscle before and after treatment.
- Results showed that both agents produced significant improvements in muscle strength without notable differences between them, suggesting the Phoenix Effect is likely due to improved local blood circulation.
Ultrasound Imaging of Ankle Retinacula: A Comprehensive Review.
Tomography
August 2024
Department of Neurosciences, Institute of Human Anatomy, University of Padova, 35121 Padova, Italy.
The retinacula of the ankle are specialized anatomical structures characterized by localized thickenings of the crural fascia that envelop the deep components of the lower leg, ankle and foot. The ankle retinacula include the extensor retinacula, the peroneal retinacula and flexor retinaculum. Despite their potential to explain persistent and unexplained pain following an injury, these structures are often overlooked or incorrectly diagnosed.
View Article and Find Full Text PDFEstimation of the number of motor units in the human extensor digitorum brevis using MScanFit.
PLoS One
April 2024
Guangdong Work Injury Rehabilitation Center, Guangzhou, Guangdong, China.
Objective: Our aim was to determine the number and size parameters of EDB motor units in healthy young adults using MScanFit, a novel approach to motor unit number estimation (MUNE). Since variability in MUNE is related to compound muscle action potential (CMAP) size, we employed a procedure to document the optimal EDB electromyographic (EMG) electrode position prior to recording MUNE, a neglected practice in MUNE.
Methods: Subjects were 21 adults 21-44 y.
Anatomical and Technical Considerations in Fascicular Nerve Transfers for Foot Drop.
J Reconstr Microsurg
January 2025
Division of Plastic and Reconstructive Surgery, Cedars-Sinai Medical Center, Los Angeles, California.
Background: Foot drop is the common endpoint for a diverse set of nerve injuries, affecting over 128,000 in the United States each year. The level of injury, finite pace of regeneration, and/ exponential decay in the percentage of motor end-plates reinnervated over time may explain the limited success with natural recovery. Past nerve techniques have also been met with limited success.
View Article and Find Full Text PDFDifferential Diagnosis of "Foot Drop": Implications for Peripheral Nerve Surgery.
J Reconstr Microsurg
September 2024
Division of Plastic and Reconstructive Surgery, Cedars-Sinai Medical Center, Los Angeles, California.
Background: At least 128,000 patients in the United States each year suffer from foot drop. This is a debilitating condition, marked by the inability to dorsiflex and/or evert the affected ankle. Such patients are rendered to a lifetime of relying on an ankle-foot orthosis (AFO) for walking and nighttime to prevent an equinovarus contracture.
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