Seated Butterfly (Chest muscles and anterior deltoid
Eletromyography Acityvit of the Pectoralis Major and Anterior Deltoid
Muscle During Three Upper-Body Lifts.
Electromyographic (EMG) data for the pectoralis major, anterior deltoid
, triceps brachii, and biceps brachii were collected during all exercises with the barbell and the Smith Machine.
2007) investigated the effects of a PE sequence on upper-body muscle activation during bench press exercise and reported that performing a pec deck exercise immediately prior to a bench press led to similar sEMG amplitude of both the anterior deltoid
and pectoralis major muscles.
Caption: Figure 3 Comparison of anterior deltoid
moment arms during scapular abduction from 0[degrees] to 140[degrees].
These muscles are the left anterior deltoid
muscle, the right rear deltoid muscle and the right rhomboid muscle (assuming you are right handed).
The anterior deltoid
EMG signal was collected during shoulder flexion, while the medial and posterior deltoid EMG signals were collected during horizontal shoulder extension.
sEMG signals were detected on seven muscles of the right shoulder after depilation and cleaning with alcohol wipes: anterior deltoid
(AD), middle deltoid (MD), posterior deltoid (PD), pectoralis major (PM), upper trapezius (UT), biceps brachii (BB), and triceps brachii (TB).
sEMG was examined by eight muscles (erector spinae neck, trapezius, supraspinatus, infraspinatus, pectoralis, anterior deltoid
, middle deltoid and latissimus dorsi) involved in scapulohumeral rhythm right shoulder of 16 right-handed subjects of which 8 were males and 8 females.
For the EMG measurements, skin was prepared over the anterior deltoid
and mid-forearm with 4x4" gauze sponges moistened with acetone.
Surface electrodes were used for upper trapezius, anterior deltoid
, middle deltoid, posterior deltoid and pectoralis major.
Muscular twitches involving the anterior deltoid
at a depth of 6 to 8 cm indicate the axillary nerve has been located.