Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________.

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19-09-2022
Biology

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Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________.

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cenonjeric3 cenonjeric3 · Answer 1 · 2022-09-22T08:09:17-04:00

90 degrees would be the maximum angle of abduction by the deltoid if there' no lateral rotation of the humerus by the teres minor and infraspinatus muscles.

The infraspinous fossa of the scapula is largely occupied by the thick, triangular infraspinatus muscle. It is a component of the rotator cuff, and the acronym "SITS" is frequently used to recall it (supraspinatus, infraspinatus, teres minor, subscapularis).

The glenohumeral joint, which supports the stability and motion of the shoulder joint, is formed by these muscles. The arm's whole range of motion is greatly influenced by the capacity to abduct the arm. The serratus anterior, deltoid, trapezius, and supraspinatus are the four muscles that are in charge of this motion.

Abductions of 15 to 90 degrees are controlled by the deltoid. The scapula, trapezius, and serratus anterior work in concert to permit abduction of the arm up to 90 degrees.

Here is another question with an answer similar to this about deltoid: https://brainly.com/question/28098840

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Question correction:

Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________.

75 degrees
90 degrees
180 degrees
30 degrees