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Anterior Neck

WVSOM -- Gross Anatomy -- Anterior Neck

QuestionAnswer
What is contained in the superficial layer of fascia? platysma
What arch does the platysma come from? 2nd (muscle of facial expression)
What innervates the platysma? Cranial Nerve VII – Cervical branch
What three compartments are in the anterior neck? vertebral, visceral and vascular
What is in the vertebral compartment? vertebral column and associated muscles
What is in the visceral compartment? thyroid and parathyroid glands, trachea, esophagus
What is in the fascular compartment? common/interal carotic arteries, internal jugular vein and vagus nerve
What is the retropharyngeal space? a potential space between the prevertebral fascia and the buccopharyngeal fascia
What does the retropharyngeal space allow? movement of the trachea, larynx, pharynx and esophagus on the vertebral column
What is the retropharyngeal space a possible conduit for? spread of infection into the posterior mediastinum
What forms the external jugular vein? union of the posterior auricular and posterior branch of the retromandibular veins
Where does the external jugular drain into? sublcavian vein
What is the communicating vein? IF present it lies along the anterior border of the SCM and drains into the anterior jubular vein
What innervates the posterior belly of the digastrics? CN VII
What innervates the anterior belly of the digastrics? V3
What innervates stylohyoid? CN VII
What innervates myohyoid? V3
What innervates Geniohyoid? C1 Ventral ramus
What constitutes the floor of the mouth? suprahyoid muscles
What are the suprahyoid muscles? mylohyoid, geniohyoid, stylohyoid, poasterior and Anterior bellies of the digastrics muscle
What are the strap muscles? omohyoid, sternohyoid, sternothyroid and thyrohyoid
What is the action of the strap muscles? stabilize and move the hyoid bone and thyroid cartilage as needed during swallowing and speaking
What inverates the omohyoid, sternohyoid and sternothyroid? Ansa Cervicalis
What innervates the Thyrohyoid? C1 Ventral ramus
What is the adam’s apple? projection of the thyroid cartilage
Where is the isthmus of they thyroid located? anterior to the tracheal rings 2-4
What are the thyroid hormones? t3,t4 and calcitonin
What provides blood supply to the Parathyroids? inferior thyroid arteries
What is the pharynx? firbromusclar tube that functions in both respiratory and digestinve systems
What binds the pharynx superiorly? sphenoid bone
What binds the pharynx posteriorly? cervical vertebrae
What does the pharynx open into? nasal cavity, mouth and larynx
What does the pharynx become inferiorly? esophagus
What are the external circular layer of muscles? superior middle and inferior
What are the external circular layers of muscles innervated by? pharyngeal plexus (IX and x)
What is the inferior external circular muscle also known as ? cricopharyngeal muscle
What is the function of the external circular layer of muscles? constrictors
What are the internal layer of muscles of the pharynx? stylopharyngeus, palatopharyngeus and salpingopharyngeus
What inverates the stylopharyngeus? CN IX
What inverates the palatopharyngeus? pharyngeal pleux
What invervates the salpingopharyngeus? pharyngeal plexus
What is the function of the salpingopharyngeus? elevates the pharynx
What is in the carotid sheath? common carotid artery, internal jugular vein and the vagus nerve (anso cervvcialis is also there)
What is the arrangement of the contents of the carotid sheath? Common carotid is medial, internal jugular is lateral and the vagus nerve is deep and in between
Where is the ansa cervicalis? embedded in the anterolateral aspect of the carotid sheath
Where does the common carotid bifurcate? near the level of the superior border of the thyroid cartilage
What is the carotid sinus? slight dilation of the proximal internal coartid aretery
What is the function of the carotid sinus? pressure receptor
What invervates the carotid sinus? CN IX and X
What is the carotid body? small reddish/brown ovoid mass that is located deep to the bifurcation of the common carotid artery
What is the function of the carotid body? chemoreceptor responding to low levels of oxygen in the blood
What innervates the carotid body? CN IX and X
What are the branches of the external carotid artery? superior thyroid, ascending pharyngeal, lingual, facial, posterior auricular, maxillary, and superficial termporal
Whow do you remember the branches of the external carotid artery? Some Aggressive Lovers Find Odd Positions More Stimulating
Where is the phrenic nerve located? anterior to the anterior scalene along with the suprascaular and transverse cervical arteries
What runs between the anterior and middle scalene muscles? brachial plexus
What are the 3 regions of the subclavian artery? 1 – medial 2-posterior 3-lateral
What are the branches of the 2st part of the suclavian artery? vertebral, internal thoracic and thyrocervical trunk
What is the 2nd part of the subclavian artery? costocervcial trunk
What is the 3rd part of the subclavian aretery? dorsal scapular artery
What are the 4 prevertebral muscles? longus coli, longus capitis, rectus capitis anterior and rectus capitus lateralis
Created by: tjamrose