Why are triangles of the neck important?

The triangles of the neck are important because of their contents, as they house all the neck structures, including glands, nerves, vessels and lymph nodes.

What important structures can you find in the posterior triangle of the neck?

These borders include the trapezius muscle posteriorly, the sternocleidomastoid muscle anteriorly, and the middle one-third of the clavicle inferiorly. 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.

What are the cervical triangles?

The only unpaired cervical triangle is the submental triangle bounded by the right and left anterior digastric muscles and the body of the hyoid. The posterior triangle is divided into unequal sized triangles by the inferior belly of omohyoid.

What is in the occipital triangle?

Occipital triangle (omotrapezoid triangle)

muscular boundaries: anteriorly - by the posterior margin of the sternocleidomastoid muscle. posteriorly - by the trapezius muscle. inferiorly - by the inferior belly of the omohyoid muscle.

How many anatomical triangles are present in the neck?

This space is subdivided into two large triangles by sternocleidomastoid, which passes obliquely across the neck, from the sternum and clavicle below, to the mastoid process and occipital bone above.

Triangles of the Neck

What structures can be seen in the anterior triangle of neck?

How many triangles are there in human body?

Digastricus, Submental Triangle, Submandibular Triangle, Carotid Triangle, Muscular Triangle, M.

What is muscular triangle?

The muscular triangle is one of the paired triangles in the anterior triangle of the neck. The triangles of the neck are surgically focused, first described from early dissection-based anatomical studies which predated cross-sectional anatomical description based on imaging (see deep spaces of the neck).

Why is the posterior triangle divided into a carefree portion above the accessory nerve and a careful portion below the accessory nerve?

The accessory nerve divides the posterior triangle into a carefree triangle above and careful triangle below, because most of the important structures lie below the nerve.

What is the lateral triangle of the neck?

Submental triangle

Lateral: anterior belly of digastric. Inferior: body of hyoid bone. Floor: mylohyoid muscle. Roof: investing layer of deep cervical fascia.

Why is it important to divide the neck into segments of triangles?

The triangles of the neck are important because of their contents, as they house all the neck structures, including glands, nerves, vessels and lymph nodes.

What is in the submental triangle?

The submental triangle harbors the submental lymph nodes that drain the mental region, the tip of the tongue, inferior lip, and incisor teeth. Also, the mylohyoid nerve and veins that drain into the anterior jugular vein traverse this region [2].

What is digastric triangle?

The submandibular triangle, also known as the digastric triangle, is bounded anteriorly by the anterior belly of the digastric muscle, posteriorly by the posterior belly of the digastric muscle, superiorly by the mandible, and inferiorly by the mylohyoid and hypoglossus muscles.

What is supraclavicular triangle?

The supraclavicular triangle is one of the paired triangles in the posterior triangle of the neck. The triangles of the neck are surgically focused, first described from early dissection-based anatomical studies which predated cross-sectional anatomical description based on imaging (see deep spaces of the neck).

What is the space between your chin and neck called?

The submental space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space located between the mylohyoid muscle superiorly, the platysma muscle inferiorly, under the chin in the midline.

What is the posterior triangle of the neck?

The omohyoid muscle splits the posterior triangle of the neck into two: The larger, superior part is termed the occipital triangle. The inferior triangle is known as the subclavian triangle and contains the distal portion of the subclavian artery. It is also known as the omoclavicular or supraclavicular triangle.

Why is it called submental triangle?

The submental triangle defines a sub-region of the anterior cervical region (anterior triangle of the neck). It is one of four smaller triangles within the anterior triangle of the neck and contains some important vascular structures.

Why is the accessory nerve unique?

The spinal accessory nerve is notable for being the only cranial nerve to both enter and exit the skull. This is due to it being unique among the cranial nerves in having neurons in the spinal cord. After leaving the skull, the cranial component detaches from the spinal component.

What happens if the accessory nerve is damaged?

The spinal accessory nerve originates in the brain and enables motion in the trapezius and sternomastoid muscles in the neck. A spinal accessory nerve injury can be caused by trauma or damage during surgery, resulting in shoulder pain, "winging" of the shoulder blades and weakness of the trapezius muscle.

What is the accessory nerve responsible for?

The accessory nerve is a cranial nerve that controls the movement of certain neck muscles. It is coiled in appearance. It is divided into spinal and cranial divisions, but its cranial part is often disregarded.

What is trapezius palsy?

Trapezius palsy is an uncommon nerve condition in the shoulder that causes pain and weakness. It involves injury to the spinal accessory nerve at the neck or shoul- der. The spinal accessory nerve runs from the neck to the trapezius muscle.

What happens if the vagus nerve is damaged?

If the vagus nerve becomes damaged by physical trauma or the growth of a tumor, it may cause digestive symptoms, or hoarseness, paralysis of the vocal cords and slowed heart rate.

How does the accessory nerve differ from the other cranial nerves?

Different from the other cranial nerves, each accessory nerve has some motor fibers originating in the lateral area of the anterior gray horns of the first five cervical spinal cord segments. The somatic motor fibers form the spinal root of CN XI, entering the cranium via the foramen magnum.

Is accessory nerve motor or sensory?

The spinal accessory nerve is a purely motor entity. It innervates both the trapezius and the sternocleidomastoid muscles.