Session 3 - Neck Flashcards
What are the triangles of the neck?
Anterior triangle
Posterior triangle
What are the boundaries of the anterior triangle?
Anterior margin of the sternocleidomastoid
Inferior border of mandible
Midline of neck
Which nerve is the platysma supplied by?
Facial nerve (CN VII)
Which nerve is the mylohyoid supplied by?
Mandibular division of the trigeminal nerve (CN V)
Which nerve are the anterior and posterior bellies of the digastric?
Mandibular division of trigeminal nerve (CN V) and and facial nerve (CNVII)
What are the contents of the anterior triangle?
Muscles: Platysma, mylohyoid, digastric, infrahyoid (stap) muscles
Carotid arteries, inferior jugular vein
List the contents of the posterior triangle
Mainly vessels and nerves
- External jugular vein
- Subclavian artery
- Subclavian vein
- Trunks of the brachial plexus
- Phrenic nerve
- Vagus nerve
- Spinal accessory nerve
List the infrahyoid muscles and which nerves they are supplied by
omohyoid, sternothyroid, sternohyoid (ansa cervicalis)
thyrohyoid (C1 fibres via hypoglossal nerve)
What are the functions of the neck?
Structural - support and move head
Visceral functions
Conduit for blood vessels and nerves
List the compartments of the neck
Visceral
Vertebral
Vascular (x2)
What does the visceral compartment contain?
Parts of the digestive and respiratory systems, and several endocrine glands
What does the vertebral compartment contain?
Cervical vertebrae, spinal cord, cervical nerves and muscles associated with the vertebral column
What does the vascular compartment contain?
Major blood vessels Vagus nerve (X)
List the layers of the the deep fascia
Investing
Prevertebral
Pretracheal
Carotid sheaths
What does the investing layer surround?
Completely surrounds most of the neck
