The recruitment order of scapular muscles depends on the characteristics of the postural task

Relationship between anthropometric and electromyographic variables of the scapular muscles

“…it is known that the recruitment order of the scapular muscles varies depending on the characteristics of the motor task. For example, during an arm raise, a specific scapular recruitment order is observed [19]. There is an activation pattern from proximal to distal, involving the scapular and spinal stabilizers (serratus anterior and lower trapezius) before the arm mobilizers (anterior deltoid) and the rotator cuff during an arm movement [19,24,33].…”

“…For example, during an arm raise, a specific scapular recruitment order is observed [19]. There is an activation pattern from proximal to distal, involving the scapular and spinal stabilizers (serratus anterior and lower trapezius) before the arm mobilizers (anterior deltoid) and the rotator cuff during an arm movement [19,24,33]. in this context, our findings indicate that a greater skinfold will cause a delay in the onset latency of the scapular muscles, and therefore an alteration of motor control and performance during an arm raise task.…”

“…Surface EMG and acceleration signals were acquired with a Delsys Trigno TM Wireless sEMG System and recorded with the Delsys EMGworks Acquisition 4.2.0 (Delsys inc., boston, MA, USA). The beginning and end of the arm raise task were determined with an accelerometer (Delsys inc. boston, MA, USA) on the anterior deltoid surface of the dominant arm [19]. The electrodes were made of silver (99%) and had an inter-electrode distance of 10 mm.…”

Effect of squatting velocity on hip muscle latency in women with patellofemoral pain syndrome

“…A full wave rectification of all raw electromyographic signals was performed and a 50 Hz low pass filter was used 2 ) . Onset latency of hip and knee was calculated relative to the accelerometer activity and corresponds to the time when the EMG activity surpassed a threshold of at least 3 standard deviations above the resting mean activity of a 200 ms window prior to the initiation of the SLS 8 , 22 , 23 , 24 ) , and remained above this threshold for 25 milliseconds. All onsets were visually confirmed since movement artifact could be misinterpreted as muscle activity 22 ) ( Fig.…”

Shoulder Taping and Neuromuscular Control

“…1 Impeded neuromuscular control of the scapulothoracic articulation is associated with common musculoskeletal shoulder conditions, such as subacromial rotator cuff impingement and rotator cuff tendinopathy. 2À6 Researchers 7,8 have noted that the onset of scapular muscle activity occurs before upper extremity movement to stabilize and position the scapula for glenohumeral elevation; however, as Struyf et al 9 observed in their systematic review, individuals with musculoskeletal shoulder conditions demonstrated variations in scapular muscle activation and timing. Therefore, conservative approaches for shoulder conditions usually include interventions designed to restore normal neuromuscular control of the scapulothoracic articulation and often incorporate therapeutic exercise and physical modalities, such as therapeutic taping.…”