What muscles are in the posterior triangle of the neck?
The union of the sternocleidomastoid and trapezius muscles at their insertion on the superior nuchal line of the occipital bone form the apex of the triangle. The posterior neck triangle is covered superficially to deep by the skin, superficial and deep cervical fascia, and the platysma muscle.
What muscles are in the back of head and neck?
Posterior neck muscles include: Splenius capitis and splenius cervicis: Strap-like muscles in the back of your neck that help you extend and rotate your head. Suboccipital muscles: Four muscles just below the occipital bone at the base of your skull. They help extend your head in different directions.
What is posterior neck surgery?
Posterior Cervical Fusion (PCF) is the general term used to describe the technique of surgically mending two (or more) cervical spine bones together along the sides of the bone using a posterior (back of the neck) incision. Bone graft is placed along the sides the spine bones, which over time, fuses (mends) together.
How long does a posterior cervical fusion take?
It usually takes a few months for the vertebrae to fuse and complete fusion may take up to a year or two.
What nerves are in the posterior triangle of the neck?
Posterior Triangle of the Neck
- Trapezius Muscle.
- Brachial Plexus.
- Sternocleidomastoid Muscle.
- Cervical Plexus.
- Suprascapular Nerve.
- Jugular Foramen.
- Vagus Nerve.
- Accessory Nerve.
Which muscle divides the neck into two triangles?
the sternocleidomastoid muscle
The neck is divided into two large triangles (anterior and posterior cervical triangles) by the sternocleidomastoid muscle. It arises from two heads (sternal and clavicular) inferiorly and takes an oblique course superiorly to insert into the mastoid process and lateral aspect of the superior nuchal line.
What are the muscles in the back of your head called?
There are four sets of muscles that help move the head. They are the sternocleidomastoid, semispinalis capitis, splenius capitis, and longissimus capitis muscles.
How long does it take for nerves to heal after neck surgery?
You may have trouble sitting or standing in one position for very long and may need pain medicine in the weeks after your surgery. You may need to wear a neck brace for a while. It may take 4 to 6 weeks to get back to your usual activities.
Why do a posterior cervical fusion?
A posterior cervical fusion may be recommended for several reasons: To stop the motion between two or more vertebrae – or spinal segments. To straighten the cervical spine and stop the progression of a spinal deformity. To stabilize the spine after a fracture or dislocation of the cervical spine.
Which nerve runs across the posterior triangle and what does it supply?
The accessory nerve (CN XI) exits the cranial cavity, descends down the neck, innervates sternocleidomastoid and enters the posterior triangle. It crosses the posterior triangle in an oblique, inferoposterior direction, within the investing layer of fascia.
Which muscle divides the neck into anterior and posterior triangles?
The sternocleidomastoid muscle
The sternocleidomastoid muscle divides the neck region into posterior and anterior triangles. The posterior triangle of the neck is located on the lateral aspect of the neck.
What is the cranial nerve that passes thru the posterior triangle?
The accessory nerve (CN XI)
Nerves. The accessory nerve (CN XI) exits the cranial cavity, descends down the neck, innervates sternocleidomastoid and enters the posterior triangle. It crosses the posterior triangle in an oblique, inferoposterior direction, within the investing layer of fascia.
Which muscle of the posterior neck Group is the deepest?
Posterior neck muscles
- Superficial layer: Trapezius, splenius capitis and splenius cervicis.
- Deep layer: cervical transversospinalis muscles (semispinalis capitis, semispinalis cervicis, multifidus cervicis)
- Deepest layer: suboccipital muscles, interspinales cervicis and intertransversarii colli muscles.
Which muscle is called your six pack?
the rectus abdominis muscle
The term “six-pack’” typically refers to the rectus abdominis muscle. This long, relatively narrow muscle runs from your sternum to your pubic bone and is responsible for dynamically flexing your spine forward ( 1 ).
How many muscles are there in the head and neck only?
twenty muscles
There are over twenty muscles in the head and neck alone. These muscles of the head and neck are responsible for a myriad of functions such as mastication, facial expressions by controlling the mouth, eyes, nose, forehead and ears, and complex movements of the neck.