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What is the action of the pectoralis minor?

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Asked By: Wilfrido Schmidtpeter | Last Updated: 9th April, 2020
The pectoralis minor depresses the point of the shoulder, drawing the scapula superior, towards the thorax, and throwing its inferior angle posteriorly.

Consequently, what is the function of the pectoralis minor muscle?

The pectoralis minor muscle functions to move the scapula both forward and downward, which helps to maintain the mobility of the shoulder joint. Additionally, this muscle helps to expand the rib cage by elevating the third through fifth ribs, which can aid in inhalation.

Secondly, what movement does the pectoralis minor perform? Function. The primary actions of this muscle include the stabilization, depression, abduction or protraction, internal rotation and downward rotation of the scapula. It elevates the ribs for deep inspiration when the pectoral girdle is fixed or elevated.

Moreover, which of the following is an action of the pectoralis minor?

The primary actions of this muscle include the stabilization, depression, abduction or protraction, upward tilt, and downward rotation of the scapula. When the ribs are immobilized, this muscle brings the scapula forward, and when the scapula is fixed, it lifts up the rib cage.

What is the action of the serratus anterior muscle?

The serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. The serratus anterior acts to pull the scapula forward around the thorax.

What exercise works the pectoralis minor?

What are the best lower chest exercises?
  • Incline pushup.
  • Dumbbell press.
  • Dumbbell press rotated.
  • Cable crossover.
  • Parallel-bar dips.
  • Summary.

What is the difference between pectoralis major and minor?

These two muscles that overlap are supposed to glide over each other with distinction. Pectoralis minor moves from the back to the front of the body while pectoralis major moves from the outside to the inside in the front plane of the body.

What causes pectoralis minor syndrome?

Sports involving a throwing or lifting motion can also produce RSI. However, this RSI causes not only NTOS but is a major cause of NPMS. Because the pectoralis minor muscle attaches to the coracoid process of the scapula, repetitive arm and shoulder movements are the usual etiology of NPMS.

What type of muscle is pectoralis minor?

Anatomical terms of muscle

The pectoralis minor (/ˌp?kt?ˈre?l?s ˈma?n?r/) is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body.

What is the action of the pectoralis major?

The pectoralis major has four actions which are primarily responsible for movement of the shoulder joint. The first action is flexion of the humerus, as in throwing a ball underhand, and in lifting a child. Secondly, it adducts the humerus, as when flapping the arms.

What does the pectoralis major and minor do?

A second pectoral muscle, the pectoralis minor, lies beneath the pectoralis major. The pectorals are predominantly used to control the movement of the arm, with the contractions of the pectoralis major pulling on the humerus to create lateral, vertical, or rotational motion.

What is the origin of pectoralis major?

The pectoralis major consists of two heads. One of the heads is called the clavicular head, which originates on the inside part of the clavicle (collarbone). The other head is called the sternal head, and it originates from three different areas, which include: Outside border of the sternum (breast plate)

What are trap muscles?

The trapezius muscle is a postural and active movement muscle, used to tilt and turn the head and neck, shrug, steady the shoulders, and twist the arms. The trapezius elevates, depresses, rotates, and retracts the scapula, or shoulder blade. Innervation of the trapezius is derived from the spinal accessory nerve.

What is the action of the latissimus dorsi?

The latissimus dorsi is the largest muscle in the upper body. The latissimus dorsi is responsible for extension, adduction, transverse extension also known as horizontal abduction, flexion from an extended position, and (medial) internal rotation of the shoulder joint.

What are the muscles in your chest?

Pectoralis muscle, any of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder. There are two such muscles on each side of the sternum (breastbone) in the human body: pectoralis major and pectoralis minor.

How do I strengthen my serratus anterior?

First, you can do a few simple exercises at home that can get your serratus anterior into gear.
  1. Do shoulder blade protractions. Lean against a wall and press the backs of your palms and your elbows against it.
  2. Scapular pushups. Do scapular pushups.
  3. Wall exercises for the serratus anterior.

What muscles attach to the coracoid process?

The coracoid process serves as the attachment site for several muscles. The pectoralis minor is attached to the medial aspect of the coracoid. The coracobrachialis is attached to the tip of the process on the medial side, and the short head of the biceps is attached to the tip of the process on the lateral side.

What bones does the pectoralis minor attach to?

Pectoralis Minor

Attachments: Originates from the 3rd-5th ribs, and inserts into the coracoid process of the scapula.

What is pectoralis minor syndrome?

Pectoralis minor syndrome (PMS) is a subset of neurogenic thoracic outlet syndrome (TOS) that can cause upper extremity symptoms of pain, paresthesia, and/or weakness due to compression of the neurovascular bundle by the pectoralis minor muscle (PM).

What bones does pectoralis minor originate from and insert on?

The pectoralis minor muscle originates from the front surfaces of the third, fourth, and fifth ribs. From these three locations, the muscle extends up the chest and inserts on the coracoid process of the scapula (shoulder blade).

What does a minor pec tear feel like?

Signs and symptoms

People suffering from a pectoral tear often describe a sudden pain or tearing sensation in the chest or front of the shoulder. In minor cases, it may be able to continue sport with just a slight increase of the normal aches and pains that are normal post exercise.

How do you treat a strained pectoral muscle?

  1. Rest. Stop activity as soon as you notice pain.
  2. Ice. Apply ice or a cold pack to the affected area for 20 minutes up to three times a day.
  3. Compression. Consider wrapping any areas of inflammation with an elastic bandage but don’t wrap too tightly as it may impair circulation.
  4. Elevation.

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