What Innervates the trapezius muscle?

Cranial nerve XI innervates the motor function of the trapezius. The function of the trapezius is to stabilize and move the scapula. The upper fibers can elevate and upwardly rotate the scapula and extend the neck.

What cranial nerve innervates the trapezius?

The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

Where does the trapezius obtain its innervation from?

Instead, motor innervation to the trapezius is conveyed by the accessory nerve (CN XI) as well as the anterior rami of the C3 and C4 spinal nerves, which also contain proprioceptive/sensory fibers from the muscle.

What is the action and innervation of the trapezius?

What causes trapezius knots?

The most common source of muscle knots is the trapezius muscle. This muscle makes a triangle-like shape from the neck to the middle of the back and the shoulder. Tension and knots in the trapezius muscles often occur due to stress and poor posture.

What is trapezius myalgia?

Trapezius myalgia (TM) is the complaint of pain, stiffness, and tightness of the upper trapezius muscle. It is characterised by acute or persistent neck-shoulder pain. TM is not a medical disorder or disease but rather a symptom of an existing underlying condition. The pain in the muscle can last a few days or longer.

Is cranial nerve 11 sensory or motor?

The accessory nerve is the eleventh paired cranial nerve. It has a purely somatic motor function, innervating the sternocleidomastoid and trapezius muscles.

Which cranial nerve controls tongue?

The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles.

What does the trapezius attach to?

The muscle inserts on the lateral third of clavicle, acromion, and spine of scapula.

What exercises work the trapezius?

Easy Exercises to Develop Your Lower Trapezius

• Rear delt cable raise.
• Rope rear delt pull.
• Overhead farmer’s walk.
• Chin-up.
• High pulley cable row.
• Y raise.

How do you relax a tight trapezius?

With your fists clenched, pull up your fists as high as you can while bending your elbows, keeping your hands close to the front of your body. Hold for a count of two. Release your arms back into a relaxed position, fists still clenched. Repeat 20 times.

Where does the innervation of the trapezius muscle come from?

Innervation The trapezius muscle is the only muscle of the upper limb that does not receive its innervation from the brachial plexus. Instead, motor innervation to the trapezius is conveyed by the accessory nerve (CN XI), while sensory innervation stems from the ventral rami of the C3 and C4 spinal nerves.

How is the trapezius muscle related to the scapula?

The trapezius muscle also functions to stabilize the scapula when you carry something at your side, such as a bag of groceries. Because of the large size of the trapezius muscle, this muscle is innervated by more than one nerve. Specifically, the trapezius nerve receives electrical impulses from the brain through the following nerves:

What causes weakness and paralysis of the trapezius muscle?

Any injury to the spinal accessory nerve (cranial nerve XI) can cause weakness or paralysis of the trapezius muscle. This would cause you difficulty in shrugging your shoulder or lifting your arm up properly. Your shoulder may also sag down on one side. Muscle spasms and pain may also affect the traps.

What is the function of the lower trapezius flap?

Lower trapezius flaps have a large arc of rotation. The lower island trapezius myocutaneous flap is applicable to the reconstruction of defects of the neck, face, oral cavity, and lateral skull.