Neck, Hyoid Bone, Trachea

Boundaries of Neck

Superior boundary and inferior boundary

Superior boundary of neck

Mandible, mastoid process, superior nuchal line, EOP

Inferior boundary of neck

Manubrium, clavicle, acromion process, CV7 SP

Parts of a mandible

Body, alveolar part, ramus, angle, masseter muscle, mental symphysis

Where is the alveolar part located in the mandible and what is it

In the body, 16 sockets that are resorbed when teeth are removed

Where is the masseter muscle

over ramus and angle

Where is the mental symphysis

Midline of chin where left and right join

Acromioclavicular joint

connects acromion and clavicle

Sternoclavicular joint

connects clavicle and sternum

Hyoid bone

Location

Muscles

Function

Shape

CV3, suprahyoid muscle, infrahyoid muscle, suspends larynx, U shaped

Thyroid cartilage

contains laryngeal prominence

Function of thyrohyoid membrane

connects hyoid and thyroid cartilage

Cricoid cartilage

Location

Function

CV6 level, encircles airway

Cricothyroid membrane

connects thyroid and cricoid cartilages

CV6 level importance (5)

larynx/trachea junction, pharynx/esophagus junction, middle cervical sympathetic ganglion, vertebral artery enters CV7 transverse foramen

2nd-3rd tracheal rings

covered by ishtmus of thyroid gland

Sternocleidomastoid muscle divides into what?

Divides neck into posterior and anterior triangles

Neck coverings

Superficial cervical fascia, deep cervical fascia, visceral layer, carotid sheath, middle cervical fascia

What is in the superficial cervical fascia?

Platysma muscle, cervical branch of facial nerve, cutaneous nerves, external/anterior jugular veins

What is in the deep cervical fascia?

Investing (anterior) layer, prevertebral (posterior) layer

Where is the investing (anterior) layer

Deep cervical fascia that surrounds SCM and trapezius, forms posterior triangle roof

Where is the prevertebral (posterior) layer

Deep cervical fascia, surround CV/CV muscles, continues as axillary fascia

Where is the visceral layer

surrounds pharynx, esophagus, larynx, trachea, thyroid, parathyroid

Caratoid sheath

Contains pretracheal layer, buccopharyngeal fascia

carotid sheath

surrounds carotid vessels, IJV, vagus nerve