Sentences with phrase «arm abduction»

It also stabilizes the humeral head in the glenoid cavity during arm abduction.

The deltoid muscles are primarily responsible for arm abduction, i.e. moving the arm away from the body in the frontal plane of motion.

During arm abduction, when we're moving it outward and away from our body, the rotator cuff compresses the glenohumeral joint, which is also known as concavity compression, so that it can allow the deltoid muscle to elevate the arm further.

Not exact matches

The Lord's Resistance Army, a cult guerrilla army engaged in an armed rebellion against the Ugandan government, has been accused of using child soldiers and committing numerous crimes against humanity; including massacres, abductions, mutilation, torture, rape, porters and sex slaves.

«Recent UN figures show that there were at least 14,500 grave violations against children in armed conflict last year, including recruitment, sexual violence and abductions.»

He said: «Following Boko Haram's abduction of three priests and a nun in the border region by Boko Haram, missionaries are now accompanied by armed soldiers when they celebrate Sunday Mass there.

Delayed glenohumeral abduction and early external rotation (hand - under - ball position; Figure 2B) may lead to the arm's being «late» in the pitching motion... The pain group had greater internal shoulder rotation at the initiation of external rotation in the stride.

SRG maintained that BSS members are the «masterminds of kidnappings / abductions for ransom; armed robbery; extortion of hapless people at gunpoint and other sundry acts of lawlessness and crimes against the state in Southeastern Nigeria.»

«Armed bandits terrorize rural communities almost at will, while kidnappings and abductions have assumed alarming notoriety as crimes.

The state Commissioner of Police, Olukolu Tahir Shina, who confirmed the abduction said the nurse was abducted at his residence Tuesday morning by hoodlums armed with locally manufactured guns.

The armed Boko Haram member, who appeared with dozens of the girls in the background, accused the Federal Government of lying to the world about the mass abduction for the two years the girls had spent in captivity.

This first prototype focuses on two movements: the adduction and abduction of the shoulder (raise and lower the arms forming a «T» with the body).

There's another test you can do to assess the status of the supraspinatus, one of the four small rotator cuff muscles which runs along the top of the shoulder blade and inserts via the tendon at the top of the arm or humerus bone, and is involved in shoulder abduction.

For example, as you move the dumbbells higher overhead and begin to rotate the forearms, the upper arms shift out to the sides, engaging shoulder abduction which incorporates the lateral delts, while the triceps assist elbow extension.

-- The arms are raised with a shoulder abduction (Lateral movement away from the midline of the body) instead of rotation.

For example, the side delts are involved in abduction of the shoulders i.e. in side raising of your arms.

Its main three functions are horizontal abduction (think rear lateral raises), external rotation of the upper arm ans well as extension of the upper arm.

Abduction — Movement of a limb away from the middle of the body, such as bringing the arm to shoulder - height from a hanging - down position.

Cross Over Upper Back Abduction: cross the arms so the right forearm rests on the left.

The middle trapezius is highly activity during retraction exercises, while the lower trapezius is highly activity in abduction / flexion exercises with the arm at or above horizontal, as well as horizontal rowing.

Abduction — Movement of a limb away from middle of body, such as bringing arm to shoulder height.

With this in mind, research has found that starting a shoulder shrug in 30 of glenohumeral abduction (i.e., arms slightly out to the sides), which is a component of slight scapula upward rotation, generated greater upper trapezius muscle activity in comparison with the shrug with the arms at the side (1).

The lateral (side) deltoid is involved in many of the same movements as the anterior deltoid: abduction (moving the arm away from the body), flexion (moving the arm upward to the front), and transverse flexion (moving the arm across the chest).

There may be pain in the shoulder when the arm is held out to the side turned outwards (abduction and external rotation).

It assists in stabilizing the head of the humerus in the glenoid cavity while the arm is elevated; the superior fibers aid in abduction, and the inferior fibers in adduction.

Shoulder abduction involves lifting the arms out to shoulder height at the sides of the body, as shown in the picture below.

The middle deltoid is often trained by performing lateral raises, which involve shoulder abduction (raising the arms out to the sides, to shoulder height).

Nevertheless, both parts of the sternocostal head display similar moment arm length to joint range of motion curves that appear as a bell - curve shape that peaks near the middle of shoulder abduction range of motion.

As is clear from the chart below, the posterior deltoid has a large shoulder horizontal abduction moment arm length, which makes it a prime mover in this movement.

The moment arm length increases gradually from 90 degrees (arms out to the sides) to approximately 40 degrees of shoulder abduction, where it remains high until 0 degrees (arms close to the sides of the body).

As is clear from the chart below, the middle deltoid has a large shoulder abduction moment arm length, which makes it a prime mover in this movement.

So the clavicular head of the pectoralis major seems only to assist in shoulder abduction and then mainly only above 40 degrees, peaking at 120 degrees (arms above the head), as is shown in the following chart below.

Ackland et al. (2008) showed that the pectoralis major (clavicular head) displayed a peak moment arm length at 120 degrees of shoulder abduction (length = +11.2 mm), and a minimum moment arm length at 2.5 degrees of shoulder abduction (length = -3.0 mm).

For the gluteus medius, Dostal et al. (1986) reported that the posterior, middle and anterior fibers all have very large hip abduction moment arms but quite small hip extension moment arms.

Further investigation by Ackland et al. (2008) showed specifically that the superior and inferior sternocostal head produce large moment arms throughout full shoulder abduction range of motion that is highest around the mid-range but is high throughout the whole shoulder abduction range of motion between 0 (arms by the sides) to 120 degrees (arms above the head).

Ackland et al. (2008) reported the anterior and middle deltoid display similarly large peak shoulder abduction moment arm lengths (anterior = 30.2 mm; middle = 29.1 mm), while the posterior deltoid displayed a peak shoulder adduction moment arm length of -15.9 mm.

Similarly, the middle deltoid had the greatest moment arm to produce shoulder abduction in the frontal plane (Browna et al. 2007).

There is limited information available about the moment arm lengths of the deltoids for performing shoulder horizontal abduction and adduction.

In contrast, the middle and posterior deltoids perform horizontal abduction (moving the hands apart), with their greatest moment arm lengths in the middle of the joint range of motion.

In contrast, Webb et al. (2012) reported that the anterior deltoid displays a minimum muscle moment arm at small abduction angles and rises with increases in angle elevation.

They reported that the moment arm length linearly increases between 120 degrees and between 80 — 60 degrees, where a shorter plateau is displayed, before a linear decrease in moment arm length as the shoulder moves towards 0 degrees of shoulder abduction.

Between 70 and 120 degrees of abduction the moment arm length linearly decreases before reaching a moment arm length of -20.0 mm.

Between 75 and 120 degrees the moment arm length appears to decrease linearly until reaching approximately -15.0 mm at 120 degrees of abduction (arms overhead).

The anterior deltoid seems to provide the largest moment arm during horizontal adduction (bringing the hands together), while the posterior deltoid provides the largest moment arm length during horizontal abduction (moving the hands away from one another).

They reported that the moment arm length is unchanged between 90 — 55 degrees of shoulder abduction, displaying a moment arm length of approximately -38.0 to -40.0 mm.

Keuchle et al. (1997) reported the change in moment arm length from 90 degrees of abduction (arms horizontal) to 55 degrees of abduction (arms pointing down).

Some shoulder rehabilitation exercises appear to target the deltoid muscles to a greater extent (internal rotation, arm elevation and horizontal abduction), while others can be used to reduce the muscle activity (arm frontal and horizontal adduction).

The greatest muscle activity was found when the arm was moving through horizontal abduction.

The moment arm length increases between 0 degrees and 70 degrees of shoulder abduction.

Between 55 degrees and 25 degrees, the moment arm decreases gradually where it then appears to decrease linearly from 35.0 mm to 20 mm towards 0 degrees of abduction.