Effective muscle elongation positions for the neck extensor muscles: An ultrasonic shear wave elastography study |
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| Affiliation: | 1. Department of Orthopedic Surgery, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Rd, Fengtai District, Beijing, China;2. China National Clinical Research Center for Neurological Diseases, No. 119 South 4th Ring West Rd, Fengtai District, Beijing, China;3. Beijing Neurosurgical Institute, Capital Medical University, No. 119 South 4th Ring West Rd, Fengtai District, Beijing, China;4. Department of Ultrasound, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Rd, Fengtai District, Beijing, China;1. Department of Radiology, Rehabilitation and Physiotherapy, Universidad Complutense de Madrid, Madrid, Spain;2. Grupo In Physio, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain;3. Faculty of Health, Universidad Católica de Ávila, Ávila, Spain;4. Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Universidad Rey Juan Carlos, Alcorcón, Spain;5. Cátedra Institucional en Docencia, Clínica e Investigación en Fisioterapia: Terapia Manual, Punción Seca y Ejercicio Terapéutico, Universidad Rey Juan Carlos, Alcorcón, Spain;6. Faculty of Health Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, Spain |
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| Abstract: | This study aimed to clarify the effective stretching positions for neck extensor muscles. Fifteen healthy men were measured shear moduli of the right neck extensor muscles using ultrasound shear wave elastography in following positions: rest (Rest), flexion (Flex), contralateral bending (Bend), flexion + contralateral bending (Flex → Bend), flexion + contralateral bending + contralateral rotation (Flex → Bend → ConRot), and flexion + contralateral bending + ipsilateral rotation (Flex → Bend → IpsRot). The increase in the shear modulus indicated a greater muscle elongation. Regarding the upper trapezius and splenius capitis, the shear moduli at Flex → Bend, Flex → Bend → ConRot, and Flex → Bend → IpsRot were significantly higher than those at Rest. The shear moduli at stretching positions, including contralateral bending, were significantly higher than those at Rest and Flex in the levator scapulae. The results indicated that the stretching position with a combination of flexion and contralateral bending could be effective for elongation of the upper trapezius and splenius capitis. Furthermore, the stretching positions including contralateral bending could be effective for the levator scapulae. |
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| Keywords: | Upper trapezius Splenius capitis Levator scapulae Neck Shear modulus |
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