What is in the carotid triangle?

The main contents of the carotid triangle are the common carotid artery (which bifurcates within the carotid triangle into the external and internal carotid arteries), the internal jugular vein, and the hypoglossal and vagus nerves.

In respect to this, what is in the carotid sheath?

The four major structures contained in the carotid sheath are: the common carotid artery as well as the internal carotid artery (medial) internal jugular vein (lateral) the vagus nerve (CN X) (posterior) the deep cervical lymph nodes.

Likewise, what is in the occipital triangle? The occipital triangle, the larger division of the posterior triangle, is bounded, in front, by the Sternocleidomastoideus; behind, by the Trapezius; below, by the Omohyoideus. Its floor is formed from above downward by the Splenius capitis, Levator scapulæ, and the Scalenus medius and posterior.

Correspondingly, what are the triangles of the neck?

The triangular space in front of this muscle is called the anterior triangle of the neck; and that behind it, the posterior triangle of the neck. The anterior triangle is further divided into muscular, carotid, submandibular and submental and the posterior into occipital and subclavian triangles.

What three landmarks created the borders of the neck anterior Triangle?

The carotid triangle is bordered by the posterior belly of the digastric muscle, the superior belly of the omohyoid muscle, and the anterior border of the SCM. The floor and medial wall of this triangle is formed by the hyoglossus, thyrohyoid, and inferior and middle pharyngeal constrictor muscles.

How deep is carotid?

Each internal carotid artery ascends the neck, passing approximately 3 mm anterior to the atlas (usually just medial to the region of the lateral mass in front of the C1 foramen of the transverse process) (Currier et al., 2008), to enter the cranial cavity via the carotid foramen (canal).

How carotid sheath is formed?

The fascia of the carotid sheath is formed by contributions from the pretracheal, prevertebral, and investing fascia layers. The carotid artery bifurcates within the sheath into the external and internal carotid arteries.

What is in the retropharyngeal space?

The retropharyngeal space is a midline deep compartment of the head and neck that consists largely of fatty areolar tissue and lymph nodes that drain the pharynx, nose, and middle ear.

What is the anterior triangle of the neck?

The anterior triangle is situated at the front of the neck. It is bounded: Superiorly – inferior border of the mandible (jawbone). Laterally – anterior border of the sternocleidomastoid. Medially – sagittal line down the midline of the neck.

Where does the common carotid artery bifurcate?

As the common carotid artery ascends into the neck, it bifurcates at approximately the level of the third or fourth cervical vertebra into the external and internal carotid arteries. The other way to look at it clinically is that the bifurcation occurs at the level of the upper border of the thyroid cartilage.

Where is the carotid nerve?

Vagus nerve (CN X). The carotid sheath is located posterior to the sternocleidomastoid muscle and is a part of the deep cervical fascia of the neck.

What does the anterior jugular vein drain into?

The anterior jugular vein arises near the hyoid bone, passes downwards along the midline of the neck. Further, near the attachment of the sternocleidomastoid muscle the anterior jugular vein penetrates the cervical fascia and drains into the subclavian vein. laryngeal veins, small thyroid vein (sometimes).

Where does internal jugular vein drain?

During its descent down the neck, the internal jugular vein receives blood from the facial, lingual, occipital, superior and middle thyroid veins. These veins drain blood from the anterior face, trachea, thyroid, oesophagus, larynx, and muscles of the neck.

What muscle divides the neck into two major triangles?

The sternocleidomastoid muscle, in its oblique (posterosuperior) course, further divides the neck into anterior and posterior triangles.

What organs are in the neck?

Your neck contains numerous vital structures, including:

Cervical spinal cord. The cervical portion of your spinal cord is located in your neck.
Vertebrae. The vertebrae are bones that encase and protect your spinal cord.
Vertebral disks.
Muscles.
Vertebral ligaments.
Nerves.
Blood vessels.
Pharynx.

What muscle divides the neck into anterior and posterior triangles?

sternocleidomastoid muscle

What is the triangular muscle?

The largest of these shoulder muscles is the deltoid. This large triangular muscle covers the glenohumeral joint and gives the shoulder its rounded-off shape. It stretches across the top of the shoulder from the clavicle in the front to the scapula in the back.

What are the contents of the posterior triangle?

The borders of the posterior triangle of the neck are formed by the trapezius muscle posteriorly, the sternocleidomastoid muscle anteriorly, and the omohyoid muscle inferiorly. The roof is formed by fascia, and the floor is formed by the splenius capitus, levator scapulae, and scalene muscles.

What does the Platysma muscle do?

The actions of the platysma muscle include pulling down the mandible, which opens the mouth, and pulling the corners of the lips out to the side and down, which forms a frown. Additionally, the platysma muscle can form wrinkles in the neck as a person ages and their skin becomes less elastic and starts to sag.

What is submandibular 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 in the submental triangle?

The submental triangle contains the submental lymph nodes, the mylohyoid nerve and veins drain into the anterior jugular vein.[1] The anterior belly of the digastric muscle is attached to the digastric fossa and runs backward and downward to join the posterior belly of the digastric muscle.

Is trapezius anterior or posterior?

Description. The trapezius is a broad, flat, superficial muscle extending from the cervical to thoracic region on the posterior aspect of the neck and trunk. The muscle is divided into three parts: descending (superior), ascending (inferior), and middle.

What are the posterior neck muscles?

The posterior triangle is a large section of muscles on the back of the sternocleidomastoid muscle that extends from behind the ear to the top of the shoulder on each side of the neck. The muscles involved here include the anterior, middle, and posterior scalene muscles. They work to elevate the first rib bone.

What is deep cervical fascia?

The deep cervical fascia (or fascia colli in older texts) lies under cover of the platysma, and invests the muscles of the neck; it also forms sheaths for the carotid vessels, and for the structures situated in front of the vertebral column. Its attachment to the hyoid bone prevents the formation of a dewlap.