The Pathophysiology Of Deltoid Muscles

|Second rib: bilateral, at the second costochondral junctions, just lateral to the junctions on the upper surfaces. |

What movements are involved in the action of standing up? What muscles need to contract to perform these actions?

Being that Jim was severed above the elbow, the specific muscles are biceps brachii, tricep brachii, brachialis, anconeus, and brachioradialis. Located on the upper region of the arm the triceps brachii controls the flexing, twisting, and supination which is the upward turning of the palm. Just in the back of the arm is the biceps brachii which stabilizes the elbow and is receptive to extension of the arm as well. Muscles need assistance to extend the forearm at the elbow and this is where the anconeus muscle comes into play. In comparison, the brachialis is also an aid or assistant in muscle but instead of extending it flexes the elbow inwards toward the body. The brachioradialis can be identified on the forearm and responsible for flexing the arm at the elbow. The major bone that was severed by the shark bite is the humerus bone, the long bone of the upper arm, which bonds the elbow and the shoulder correspondingly to the ulna and

Movement of the deltoid begins in the cerebrum of the brain, but more specifically: in the frontal lobe, the premotor cortex is relaying instructions to the primary motor cortex. The primary motor cortex contains the upper motor neurons whose axons will travel down the pyramids of the medulla oblongata and synapse on lower motor neurons in the anterior gray horns of spinal cord segments C5-C6. From there, the ventral rami of spinal nerves C5-C6 form the superior trunk of the brachial plexus, which splits into two divisions. We will follow the posterior division that supplies to extensor muscles. This posterior division then runs into the posterior cord from which the axillary nerve is derived. The axillary nerve’s motor end innervates the deltoid through its neuromuscular junction.

Biceps Brachii - It's attachments are the coracoid process, supraglenoid tuberosity, and radial tuberosity. When it contracts it causes flexion and supination. It's located close to the endangerment site the antecubital. This area is known for housing chronic pain.

Descriptive terms are used to name skeletal muscles. Some names give the location in the body. The temporalis muscle is attached to the temporal bone in the skull. The brachialis muscle is attached to the humerus bone, but brachial refers to the main artery in the arm. Some muscles are named for their origins and insertions, like the genioglossus muscle, for example, originates at the chin (geneion) and inserts in the tongue (glossus). Some muscles are named for the arrangement of the fascicle groups. For example the rectus abdominus is the straight muscle that is in the adbominus.

Q5: In case abdominal muscles are weak, the erector spinae muscles can hyperextend lower back to correct back extension activities. Therefore, the abdominal muscles are weaker than the erector spinae because they tilt the pelvis forward improving the mechanical positioning of the erector spinae. Examples of affected exercises are like squat, military press and dead lifts of which can be corrected by the

Shoulder flexion/extension; Elbow flexion and extension; Use of the lower and upper back. Muscles involved include the latissimus dorsi, rhomboids, trapezius, deltoids and the pectorals.

The shoulder is a ball and socket joint which allows it a flexion and extension motion.

In task B, the rectus abdominus muscle activity doubled and the external oblique increased times four. The internal oblique muscle was more active than the external oblique in task C and D than it was in task B. This is because of the potential for rolling off the ball which caused a co-contraction of the rectus abdominus and the external oblique muscles. When all of these muscles contracted, this helped to provide stability to the body.

The deltoid is not technically one of the four muscles directly related to the rotator cuff, but it’s a very important factor in the shoulder. If the supraspinatus is torn, the deltoid becomes the only shoulder elevator. When the deltoid is in use, the posterior and the middle of the anterior depending on the direction of the arm’s elevation, is typically used

(Peterson and Redlund-Johnell, 2009). Functional movements of the joint include flexion, extension, abduction, adduction both frontal and transverse plane, medial and lateral rotation and circumduction. The shoulder also allows for scapular protraction, retraction, elevation, and depression (Quillen, Wuchner, Hatch, 2004). The primary stabilisers of the shoulder are the biceps brachii (anterior side of the arm), and tendons of the rotator cuff (supraspinatus, infraspinatus, teres minor, and subscapularis) which stabilise the joint by fusing to all sides of the capsule except the inferior margin (Tami, Akutsu and Yano, 2013). The joint capsule and the ligaments of the GH joint work together to provide passive restraint, ensuring the humeral head remains in contact with the glenoid fossa. The lateral attachment of the GH joint capsule attaches to the anatomical neck of the humerous while the glenoid and the labrum are the medial attachment points (Dutton, 2008). When the arm is in the resting position, the inferior and anterior portions of the capsule is loose, while the superior portion is tight.

The shoulder is the most mobile joint in the body. This outstanding range of motion comes at a cost though as it must sacrifice stability in order to move the way it does. The ball and socket joint that makes up the shoulder has a very small socket (glenoid fossa) in comparison to the ball (head of the humerus) that rotates in it, and there are a lot of muscles that must work together in unison to maintain ideal stable position of the two as the arm moves through space. If any of these muscles or groups of muscles are hypertonic or out of balance with those opposing them, issues are prone to occur. However, proper movement of the scapula does not solely rely upon the muscles directly connected to it, but also the ability of the neck, and of

The deltoid muscle is a rounded triangular muscle located on the uppermost part of the arm and the top of the shoulder. The deltoid is attached by tendons to your collarbone. This muscle is one of your most important muscles because you use it on a daily basis. It is important to strengthen this muscle.

The shoulder joint, also called glenohumeral joint. It is located between the humerus and the glenoid fossa of the scapula. It relies on the shoulder girdle joint to perform movements above an angle of 90°, so in overhead sports these two joints work together constantly. The shoulder girdle, also called scapulothoracic joint, is a joint located on the posterior side of the trunk where the scapula moves on the rib cage. This joint gives range of motion to the upper extremity; if it were not for this joint, the shoulder joint would not have a range of motion above 90 degrees. The scapulothoracic joint itself is not a synovial joint, and it does not move as much, so it depends on the sternoclavicular joint and the acromioclavicular joint to move.