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What muscle originates on the anterior surface of the scapula and inserts on the proximal anterior humerus?
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.
Name the depression on the ulna into which the humerus inserts?
The depression on the ulna into which the humerus inserts is called the trochlear notch. This forms the hinge joint known as the elbow joint.
What muscle originates on the Occipital Bone and inserts on the Skin and muscle around the eye?
The occipitofrontalis muscle originates on the occipital bone and inserts on the skin and muscle around the eye. It is responsible for raising the eyebrows and wrinkling the forehead.
What bones are involved in pull ups?
Pull ups primarily target the muscles in the back and arms, including the latissimus dorsi, biceps, and forearms. While the bones that make up the arms (humerus, radius, ulna) are involved in the movement, the main bones directly involved in pull ups are the scapulae (shoulder blades) and the spine. The scapulae move and stabilize during pull ups, while the spine provides support and alignment throughout the exercise.
What is erector spinae activity?
The erector spinae is actually a group of three long postural muscles; iliocostalis, longissimus and spinalis. Their actions are pretty much the same. Iliocostalis is the most lateral of the group. Its origin is the thoracolumbar aponeurosis and ribs one through twelve. It inserts on the transverse processes of lumbar vertebrae one through three, all twelve ribs and the transverse processes of the lower cervical vertebrae. In other words, it begins on the lower vertebral column, arcs outward across the ribs where it has both origins and insertions, and arcs back inward at the lower neck. The long tendons of iliocostalis extend laterally beneath the scapula. It allows unilateral lateral flexion and bilateral extension of the spine. Longissimus, the middle muscle and (as its name suggests) longest of the group, originates on the thoracolumbar aponeurosis and the transverse processes of the thoracic vertebrae one through five. It inserts on ribs four through twelve and the transverse processes of the cervical vertebrae ending at the mastoid process. Longissimus is thick and along with iliocostalis it makes a visible mound along the spine. As mentioned earlier, this muscle's cross sectional area, its thickness, tells you that it is very powerful. Its actions are the same as iliocostalis, but unlike the rest of the group, it has action on the neck as well. Spinalis is the smallest and most medial of the group, lying within the lamina groove. Unlike the rest of the group whose origin is inferior to its insertion, it originates superiorly; at the ligamentum nuchae, the spinous process of cervical vertebra 7, and the spinous processes of the lower thoracic and upper lumbar vertebrae. It inserts at the spinous processes of cervical vertebrae two through seven and the spinous processes of the upper thoracic vertebrae.
What is the large broad sheet of muscle that originates along the thoracic and lumbar vertebra and inserts upon the humerus?
Latissimus dorsi
What bones are connected to the latissimus dorsi?
The latissimus dorsi comes from the spinous processes of the seventh to twelfth thoracic vertebrae, inferior three or four ribs, and the scapula. It inserts into the humerus.
What muscle originates on the anterior surface of the scapula and inserts on the proximal anterior humerus?
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.
What bone do the muscles of the rotator cuff originate?
The rotator cuff muscles are referred to occasionally as the SITS muscles. The Supraspinatus, Infraspinatus, Teres minor and the subscapularis. The Supras. originates on the scapula and inserts on the humerus. The Infras. originates on the scapula and inserts on the humerus(greater tubercle. The Teres minor originates on the scapula and inserts on the humerus. The Subscapularis originates on the scapula and inserts on the humerus(lesser tubercle). The function of this muscle group is to stabilize the shoulder joint. Hope this helps.
What muscle originates on scapula and proximal humerus and inserts on olecranon process?
The triceps originates on the scapula and proximal humerus and inserts on the olecranon process. The muscles has three heads (hence its name) so it has multiple origins.
What is the insertion of the lats?
The latissimus dorsi muscle, commonly referred to as the lats, primarily inserts at the intertubercular groove of the humerus. This large, flat muscle originates from the lower back, specifically from the spinous processes of the lower thoracic vertebrae, lumbar vertebrae, and the iliac crest. Its insertion allows the lats to play a crucial role in movements such as adduction, extension, and internal rotation of the shoulder joint.
What muscle flexes the elbow but neither originates nor inserts on the humerus?
The biceps brachii muscle.
What muscle originates on the distal anterior humerus and inserts onto the coronoid process of the ulna to cause arm reflexion?
The brachialis muscle originates on the distal anterior humerus and insert at the coronoid process. The function of the brachialis is flexion at the elbow.
What large muscle originates along the sternum and inserts onto the humerus?
You have the pectoralis major muscle in the chest wall. It arise from the sternum and the clavicle. It is inserted on the lateral part of the bicipital groove.
What back muscle originates on the vertebral spinous processes?
The rhomboid major originates on the spinous processes of the second to fifth thoracic border and inserts on the medial border of the scapula. It retracts the scapula.
Where on the humerus is the flexor of the elbow?
The primary flexor of the elbow is the biceps brachii, which originates from the scapula and attaches to the radial tuberosity on the radius, not directly on the humerus. However, the brachialis, another key flexor, originates from the anterior surface of the humerus, specifically the distal half of the shaft. It inserts onto the ulnar tuberosity and coronoid process of the ulna, contributing significantly to elbow flexion.
Does the biceps brachii muscle originate or insert on the humerus?
It inserts onto the humerus. It originates from the coracoid process of the scapula. There are 2 parts - Long head and short head. The long head is connected to the coracoid process by a tendon that comes up between the tubercules of the humerous. The short head is connected directly to the humerus.
