The Neck Flashcards
Borders of the neck
Anteriorly - from the lower border of the mandible to the upper surface of the manubrium
Posteriorly - from the superior nuchal line (occipital bone) to the intervertebral disc between C7 and T1
Functional compartments
Anterior visceral compartment - parts of digestive and respiratory systems and endocrine glands
Posterior vertebral compartment - cervical vertebrae, spinal cord, cervical nerve, muscles (support)
2 lateral neurovascular compartments - blood vessels and vagus nerve
Fascia of neck
Superficial and deep
Superficial fascia contains
thin sheet of muscle than blends in with the muscles of the face
Deep fascia contains
Investing layer - surrounds everything
Pre vertebral layer - surrounds posterior compartment
Pre tracheal layer - surrounds anterior compartment
Carotid sheaths - surround neurovascular compartments
Neck - C1
Open mouth
Neck - C2
Superior cervical ganglion
Neck - C3
Body of hyoid
Neck - C4
Upper body of the thyroid cartilage, bifurcation of common carotid artery
Neck - C6
Cricoid cartilage, middle cervical ganglion
Neck - C7
Inferior cervical ganglion
Boundaries of thoracic inlet
T1 posteriorly, 1st ribs anteriorly, superior border of the manubrium anteriorly
Structures passing through the thoracic inlet
trachea oesophagus brachiocephalic veins and arteries vagus nerves left common carotid and subclavian arteries sympathetic trunk left recurrent laryngeal nerve phrenic nerves
Boundaries of the anterior triangle of the neck
Anterior border of sternocleidomastoid
Inferior border of the mandible
Midline of neck
Boundaries of the posterior triangle of the neck
Posterior border of sternocleidomastoid
Anterior border of the trapezius
Middle 1/3 of clavicle
Contents of the anterior triangle of neck
Mainly Muscles:
- Mylohyloid
- Platysma (superficial facial muscle)
- Digastric
- Infrahyoid (strap)
Common carotid arteries
Internal jugular vein
Larynx and trachea
Contents of the posterior triangle of neck
Mainly blood vessels and nerves:
- External jugular vein
- Internal jugular bein
- Subclavian artery and vein
- Trunks of the brachial plexus
- Phrenic nerve
- Spinal accessory nerve
- Vagus nerve
Mylohyoid muscle attachments and function
From the myohyloid line on the mandible - inserts in the body of the hyoid
Function - support and elevate floor of mouth
The infrahyoid (strap) muscles
Sternohyoid
Omohyoid
Thyrohyoid
Sternothyroid
Sternohyoid attachments
From the posterior aspect of the sternoclavicular joint to the body of the hyoid
Omohyoid attachments
From the superior border of the scapular to the lower border of the hyoid
Thyrohyoid attachments
From the thyroid cartilage to the greater horn of the hyoid
Sternothyroid attachments
From the posterior surface of the manubrium to the thyroid cartilage