Neck Myology Flashcards
What are the borders of the Posterior Triangle of the neck?
Anterior: Posterior Edge of Sternocleidomastoid M.
Posterior: Anterior Edge of Trapezius M.
Inferior: Clavicle
What are the contents of the Posterior Triangle of the neck?
Levator Scapulae M.
Anterior, middle, and posterior scalene M.s.
Inferior belly of Omohyoid M.
Splenius Capitus M.
What divides the Occipital Triangle and the Supraclavicular Triangle?
Inferior belly of Omohyoid M.
What are the contents of the supraclavicular triangle?
3rd part of subclavian A.
Suprascapular A.
What does the spinal accessory N. innervate? Which cranial N. is it?
CN XI
Innervates Sternocleidomastoid M. and Trapezius M.
A pt with a fibrous tissue tumor within the Sternocleidomastoid M. will most likely present with what disorder?
Congenital torticollis
A patient presenting with abnormal tonicity of the sternocleidomastoid and trapezius Ms. most likely has what disorder?
Spasmodic torticullis
A patient with a hematoma impinging on the Spinal Accessory N. most likely has what disorder?
Congenital Torticullis
What are the borders of the Anterior Triangle?
Median Line of the Neck
Sternocleidomastoid M.
Mandible
What are the muscular contents of the Anterior Triangle?
Mylohyoid M.
Geniohyoid M.
Digastric M.
Stylohyoid M.
Sternohyoid M.
Sternothyroid M.
Thyrohyoid M.
Superior Belly of Omohyoid M.
What divides the Submental Triangle from the Submandibular Triangle?
Anterior Belly of Digastric M.
What are the contents of the Submental Triangle?
Submental A.
Submental LNs
Small veins
What are the contents of the submandibular Triangle?
Submandibular gland
Hypoglossal N.
Nerve to Mylohyoid M.
Parts of Facial A.
What divides the Muscular triangle from the Carotid Triangle?
Superior Belly of the Omohyoid M.
What are the contents of the Muscular triangle?
Thyroid Gland
Parathyroid Glands
What are the contents of the Carotid triangle?
Common Carotid A.
Internal Jugular V.
Vagus N.
Hypoglossal N.
Spinal Accessory N.
Superior root of Ansa Cervicalis
Thyroid Gland
Larynx, Pharynx
Branches of cervical plexus
What are the suprahyoid muscles?
Mylohyoid M.
Geniohyoid M.
Digastric M.
Stylohyoid M.
What is the innervation of the Geniohyoid M.?
C1 via Hypoglossal N.
What does the Mylohyoid N. innervate?
Mylohyoid M.
Anterior belly of Digastric M.
What is the posterior belly of Digastric M. innervated by?
Facial N.
What is the Stylohyoid M. Innervated by?
Facial N.
What are the Infrahyoid Ms.?
Sternohyoid M.
Sternothyroid M.
Thyrohyoid M.
Omohyoid M.
What does the Ansa Cervicalis innervate?
Sternohyoid M. (C1-3)
Sternothyroid M. (C2,3)
Omohyoid M. (C1-3)
What is the thyrohyoid M. Innervated by?
C1 via Hypoglossal N.
What is the action and innervation of the Platysma M.?
Draws corners of mouth down, skin of neck up (Yikes face)
Cervical Branch of Facial N.
Where doe the pharyngeal constrictor muscles insert?
Median Raphe of Pharynx
What are the pharyngeal constrictor muscles innervated by?
Pharyngeal Branch of Vagus N. and Pharyngeal Plexus
Middle and Inferior pharyngeal constrictor ms. also innervated by branches of Recurrent Laryngeal N.
What are the muscles that elevate the pharynx?
Palatopharyngeus M.
Salpingopharyngeus M.
Stylopharyngeus M.
Stlyloglossus M.
What innervates the Palatopharyngeus and Salpingopharyngeus Ms.?
Pharyngeal branch of Vagus N. and Pharyngeal Plexus
What innervates the stylopharyngeus M.?
Glossopharyngeal N.
What is the innervation of the Cricothyroid M.?
External Laryngeal N.
What laryngeal ms. are innervated by the Recurrent Laryngeal N.?
Posterior Cricoarytenoid M.
Lateral Cricoarytenoid M.
Transverse Arytenoid M.
Oblique Arytenoid M.
Aryepiglottic M.
Thyroarytenoid M.
Vocalis M.
(All except Cricothyroid M.)
Which zone of penetrating neck trauma is the most common, most dangerous, but the easiest to fix?
Zone 2
What does Zone 1 of penetrating neck trauma encompass?
Clavicle to Cricoid Cartilage
What does Zone 2 of penetrating neck trauma encompass?
Cricoid cartilage to angle of mandible
What does Zone 3 of penetrating neck trauma encompass
Angle of mandible to base of skull
