What is the innervation of latissimus dorsi?
The latissimus dorsi is innervated by the sixth, seventh, and eighth cervical nerves through the thoracodorsal (long subscapular) nerve. Electromyography suggests that it consists of six groups of muscle fibres that can be independently coordinated by the central nervous system.
What is the latissimus dorsi responsible for?
Functionally, the latissimus dorsi muscle belongs to the muscles of the scapular motion. This muscle is able to pull the inferior angle of the scapula in various directions, producing movements on the shoulder joint; internal rotation, adduction and extension of the arm.
What is the origin and insertion of latissimus dorsi?
Origin of the latissimus dorsi is from spinous processes of thoracic T7–T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula and insertion on floor of intertubercular groove of the humerus.
What is the primary action of the latissimus dorsi?
Actions of Latissimus Dorsi:
Medially rotates the arm at the shoulder (glenohumeral) joint. c. Extends the arm at the shoulder (glenohumeral) joint.
What happens when the thoracodorsal nerve is damaged?
An intact thoracodorsal nerve may also cause atrophy of the muscle, which can lead to shoulder and arm weakness that hampers numerous common movements, including standing up from a chair.
What is innervated by radial nerve?
The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb. It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.
What is the antagonist of latissimus dorsi?
The muscles that perform these movements, and therefore are antagonists of the latissimus dorsi, include the deltoid, supraspinatus, biceps brachii, coracobrachialis, pectoralis major, infraspinatus, and teres minor.
How do you test the latissimus dorsi?
Latissimus Dorsi Muscle Strength Assessment – YouTube
How do you activate the latissimus dorsi?
Lat Activation Exercises – How to FIRE UP those Back Muscles! – YouTube
What is the antagonist of the latissimus dorsi?
How do you test the latissimus dorsi muscle?
How do you test for long thoracic nerve damage?
Nerve conduction studies and EMG test of the long thoracic nerve, serratus anterior muscle and other muscles of the shoulder blade are beneficial to diagnose and quantify the degree of nerve and muscle damage. The tests are also useful to assess and follow recovery of the nerve.
How do you know if you have long thoracic nerve damage?
Typical signs and symptoms are as follows: Observable scapular winging at rest (usually inferior border only), with overhead movements, or resisted wall push-ups/push-ups whereby the entire scapula demonstrates winging (see figure 2). Pain around the base of the neck, deltoid, and scapula.
Which muscles are innervated by the median nerve?
The median nerve predominantly provides motor innervation to the flexor muscles of the forearm and hand as well as those muscles responsible for flexion, abduction, opposition, and extension of the thumb.
What are the 5 major nerve Innervations of shoulder arm?
The fifth and final level of the brachial plexus are the five nerves that feed the shoulder and arm called “branches.” These five branches are named the musculocutaneous, axillary, radial, median, and ulnar nerves.
Which muscle is the prime mover of the arm?
biceps brachii
Prime mover or agonist: principal muscle that performs action. For example, biceps brachii is the prime mover, the brachialis is a synergistic muscle for that action. Synergists: act together. For example, the biceps brachii and brachialis muscles both act to flex the forearm.
What muscle is the prime mover of the shoulder?
Pectoralis major is the muscle which acts as prime mover in shoulder flexion.
What does a latissimus dorsi strain feel like?
When your latissimus dorsi is injured, you might feel pain in your low back, mid-to-upper back, along the base of your scapula, or in the back of the shoulder. You may even feel pain along the inside of the arm, all the way down to your fingers.
How do you treat a strained latissimus dorsi?
Immediate self-care.
- Rest by avoiding activities like exercising, which may cause more discomfort, pain, and swelling.
- Ice the injured area by using an ice pack wrapped in a thin towel for 15 to 20 minutes. Do this every 2 to 3 hours during the first few days after the injury.
How do you loosen your lats?
How to Properly Stretch Your Lats – YouTube
How do you know if you have weak lats?
A weak lats muscle may interfere with bringing your arm toward your body or your body toward your arm. Weakness may also interrupt your ability to laterally flex your trunk. If your lats are tight or short, it will be hard to take your arm up in front of you, or out to the side.
What does a pulled latissimus dorsi feel like?
What does thoracic nerve pain feel like?
It may present itself as a dull, aching pain, an electric shock-like pain, or a sharp, stabbing pain. The pain may be continuous or intermittent. Since the pain is radiating to other parts of the body, it can be difficult for a person to self-diagnose and understand the true cause of their pain.
What happens if the Thoracodorsal nerve is damaged?