Arm Flexion Influence on Muscle Reaction Time in Females with Active Myofascial Trigger Point

Yassin, Marzieh; Talebian, Saeed; Takamjani, Ismail Ebrahimi; Maroufi, Nader; Ahmadi, Amir; Sarrafzadeh, Javad; Jaberzadeh, Shapour; Emrani, A.

doi:10.9734/bjast/2015/17447

Cited by 2 publications

(3 citation statements)

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“…The initial shoulder flexion angle of the electrical sensor was 60°, which was displaced by an event marker on the SEMG signal. After the shoulder was flexed to 90°, the end of motion was detected by an electrical sensor synchronized with the SEMG (16). Anterior deltoid was investigated as the primary mover muscle for defining the onset of activity of muscles.…”

Section: Medial Head Of Gastrocnemiusmentioning

confidence: 99%

“…Yassin et al (16) examined the reaction time in postural muscles with AMTrP and LMTrP in the upper trapezius muscle. They showed that MTrPs are responsible for changing the reaction time.…”

Section: Introductionmentioning

confidence: 99%

“…They showed that MTrPs are responsible for changing the reaction time. However, they did not investigate the muscles recruitment patterns in patients under study (16).…”

Section: Introductionmentioning

confidence: 99%

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Muscles Recruitment Pattern in People with and Without Active Upper Trapezius Myofascial Trigger Points in the Standing Posture

Takamjani

Yassin

Talebian

et al. 2018

Middle East J Rehabil Health Stud

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Background: Myofascial trigger points are known as the main reasons for the neck pain. Myofascial trigger points may change the coordination of cervical muscles and cause impaired proprioception. Objectives: The aim of this study was to investigate the onset of shoulder and cervical muscles activity and muscles recruitment pattern in patients with an active myofascial trigger point in the upper trapezius. Methods: 15 patient subjects (aged 26.80 ± 2.67 years) with one active myofascial trigger point in the upper trapezius and 15 control subjects (aged 27.73 ± 3.43 years) participated in this study. The subjects flexed their arms in response to a sound stimulus. The onset time of anterior deltoid was chosen as the initial point in showing the onset time of cervical paraspinal, lumbar paraspinal, upper trapezius, sternocleidomastoid, and medial head of gastrocnemius muscles.Results: The patient group represented a delay in the onset of muscles activity and altered muscle recruitment pattern compared to the control subjects (P < 0.001). However, the sternocleidomastoid muscle showed no delay in this group (P = 0.67). Conclusions: These results showed latency in the onset of muscles activity and altered muscles recruitment patterns. The altered muscles recruitment pattern may lead to changes in motor control strategies and poor control of movement. Finally, these changes can cause a poor control of movement and increase the possibility of damage to the shoulder and cervical muscles in patients with an active myofascial trigger point in the upper trapezius.

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Section: Medial Head Of Gastrocnemiusmentioning

confidence: 99%

“…Yassin et al (16) examined the reaction time in postural muscles with AMTrP and LMTrP in the upper trapezius muscle. They showed that MTrPs are responsible for changing the reaction time.…”

Section: Introductionmentioning

confidence: 99%