Scalp, Neck and Its Fascia, Lymph Drainage of Head, and TMJ

Supraorbital margins of frontal bone to superior nuchal lines of occipital bone and laterally to zygomatic arches

What does the scalp extend from?

1. Skin

2. Connective tissue

3. Aponeurosis (occipitofrontalis tendon)

4. Loose connective tissue (for movement)

5. Periosteum (external part)

What are the layers of the scalp from superficial to deep?

Connect head to trunk and serve as passageway for structures

What does the neck do?

Common and internal carotid arteries, internal jugular vein, CN X (vagus nerve), lymph nodes, carotid sinus nerve, and sympathetic fibers

What is found within the carotid sheath?

Superficial cervical lymph nodes -> deep cervical lymph nodes -> L or R jugular trunks -> thoracic duct (L) or R venous angle (R)

Where does lymph from the superficial tissues of the neck drain to?

Along external jugular vein

Where are the superficial cervical lymph nodes located?

Along internal jugular vein

Where are the deep cervical lymph nodes located?

Modified hinge synovial with articular disc

What type of joint is the temporomandibular joint?

Mandibular fossa and articular tubercle of temporal bone with articular disc

What are the articular surfaces of the superior articular cavity of the TMJ?

Protrusion and retrusion (gliding movements)

What movement(s) can occur at the superior articular cavity of the TMJ?

Articular disc with head of condyloid process of mandible

What are the articular surfaces of the inferior articular cavity of the TMJ?

Elevation and depression (hinge movements) and lateral deviation (rotational movements)

What movement(s) can occur at the inferior articular cavity of the TMJ?

Inferior to mandibular fossa

When the mouth is closed, where is the head of the condyloid process located?

Moves anteriorly; inferior to articular tubercle

When the mouth is open, where does the head of the condyloid process move and what is it located inferior to?