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What structure connecting the pectoral muscle to the humerus?
The structure connecting the pectoral muscle to the humerus is the tendon of the pectoralis major muscle. This tendon attaches the muscle to the upper arm bone (humerus), allowing for movements like shoulder flexion, adduction, and medial rotation.
What is the action of the coracobrachialis?
It contributes to adduction, horizontal adduction, and flexion of the humerus, enabling the arm to swing forwards, and it is a synergist of the pectoralis minor.
What are your shoulder is an example of?
The shoulder is an example of a ball-and-socket joint, where the head of the humerus articulates with the glenoid fossa of the scapula. This joint provides a wide range of motion, allowing for movements like flexion, extension, abduction, adduction, and rotation of the arm. The surrounding muscles, ligaments, and tendons help stabilize and support the shoulder joint during movement.
What is the trochlear notch that articulates with the humerus?
The trochlear notch is a depression on the proximal end of the ulna bone that articulates with the trochlea of the humerus. This forms the hinge joint of the elbow, allowing for flexion and extension of the forearm.
Include the hip kness and elbow joints?
The hip joint is a ball and socket joint connecting the femur and pelvis, allowing for a wide range of motion. The knee joint is a hinge joint connecting the femur and tibia, allowing for flexion and extension movements. The elbow joint is a hinge joint connecting the humerus, radius, and ulna, allowing for flexion and extension as well as rotation of the forearm.
What structure connecting the pectoral muscle to the humerus?
The structure connecting the pectoral muscle to the humerus is the tendon of the pectoralis major muscle. This tendon attaches the muscle to the upper arm bone (humerus), allowing for movements like shoulder flexion, adduction, and medial rotation.
Glenoid fossa of scapula articulates with?
The glenoid fossa of the scapula articulates with the head of the humerus to form the shoulder joint, also known as the glenohumeral joint. This joint allows for a wide range of motion in the shoulder, including flexion, extension, abduction, adduction, internal rotation, and external rotation.
Which muscle does not attach to the ribs and iliac crest?
The pectoralis major is a muscle that does not attach to the ribs or the iliac crest. Instead, it primarily originates from the clavicle and the sternum and inserts into the humerus. Its primary functions include shoulder flexion, adduction, and internal rotation.
What movement can the shoulder joint not do despite being a multi-axial joint that allows a variety of movements?
Flexion, extension/hyperextension, trabsverse horizontal abduction, circumduction.If you think about the movements that you can do at your shoulder, you can figure this question out yourself. When in the anatomical position, we can perform flexion and extension,the forward and backward (respectively) movements of our arm at the shoulder joint. There is also abduction and adduction, which is the movement of rising our arm out to our sides, away from our body (abduction) and towards our body (adduction). Finally, there is also medial rotation and lateral rotation of the shoulder joint, in which we rotate the head of humerus in the shoulder-joint cavity (glenoid cavity). You may hear the combined movements of flexion, extension, abduction and adduction referred to as circumduction.
Which joint does the pectoral major cross?
The pectoralis major crosses the shoulder joint, also known as the glenohumeral joint. This muscle attaches from the sternum and clavicle to the humerus, allowing for movements like arm flexion, adduction, and medial rotation.
What is the action of the coracobrachialis?
It contributes to adduction, horizontal adduction, and flexion of the humerus, enabling the arm to swing forwards, and it is a synergist of the pectoralis minor.
To be able to have proper access to the supraspinatus tendon which position would work best?
Internally rotating, extending, and adducting the humerus. (Medial rotation, extension, and adduction of shoulder)
What does the latissimus dorsi to the arm?
The latissimus dorsi is responsible for extension, adduction, transverse extension also known as horizontal abduction, flexion from an extended position, and internal rotation of theshoulder joint. It also has a synergistic role in extension and lateral flexion of the lumbar spine.
What are your shoulder is an example of?
The shoulder is an example of a ball-and-socket joint, where the head of the humerus articulates with the glenoid fossa of the scapula. This joint provides a wide range of motion, allowing for movements like flexion, extension, abduction, adduction, and rotation of the arm. The surrounding muscles, ligaments, and tendons help stabilize and support the shoulder joint during movement.
Teres major antagonist?
The teres major muscle functions in both adduction and medial rotation of the humerus. The antagonists of this muscle are those which abduct the humerus and rotate it externally. The infraspinatus, posterior deltoid, and teres minor all function as antagonists of the teres major.
How does the humerus articulate with the radius and ulna?
The humerus articulates with the radius and ulna at the elbow joint. The trochlea of the humerus articulates with the trochlear notch of the ulna, forming a hinge joint that allows for flexion and extension. The capitulum of the humerus articulates with the head of the radius, allowing for rotation of the forearm.
What muscle is the main antagonist of medial rotation of the humerus?
The main antagonist of medial rotation of the humerus is the infraspinatus muscle, one of the rotator cuff muscles. It works in opposition to the muscles that perform medial rotation, such as the subscapularis.
