Triangles of the Neck Flashcards
Boundaries of the Posterior Triangle
Anterior Border of Trapezius Posterior Border of SCM Middle 1/3 Clavicle Roof - Deep Cervical Fascia Floor - Prevertebral Fascia on Scalene Muscles
What nerve supplies SCM?
Accessory (spinal part)
Name the insertion of Trapezius
Lateral 1/3 of Clavicle, spine and acromium of scapula.
Name the nerve roots of the Greater Auricular Nerve. What does it supply?
C2-C3. Parotid Capsule
which nerve of the cervical plexus solely carries C2 fibres?
Lesser occipital nerve
What are the nerve roots of the supraclavicular nerves?
C3 and C4
Which nerves of the cervical plexus have nerve roots C2 and C3?
Transverse Cervical an Greater Auricular
Over which muscle does the accessory nerve run?
Levator Scapulae
What muscles are supplied by the nasal cervicalis?
Infrahyoid muscles except thyrohyoid.
What is the nerve root innervation of thyrohyoid?
C1.
Which nerves emerge through scalenus medius?
Dorsal scapula and long thoracic
Name the innervation of Scalenus Anterior
C4-C6
Where do the scalene muscles ariginate?
Middle (C2-C6)
Anterior (C3-C6)
Posterior (C4-C6)
Which scalene muscle has the innervation C3-C8?
Scalenus Medius
Which scalene muscle has the innervation C4-C6?
Scalenus Anterior
Which scalene muscle has the innervation C6-C8?
Scalenus Posterior
What is the origin, insertion and innervation of levator scapulae?
Transverse processes of C1-C4
Medial scapulae Border
C3-C5
Which muscle in the posterior triangle inserts into the mastoid process? What is the innervation of this muscle? And it’s origin?
Splenius Capitus. C3-C4. Spinous processes of C7-T3
What structure is found in the interscalene space?
Brachial Plexus
Where is the phrenic nerve located in the posterior triangle?
Lateral to the EJV.
Name the boundaries of the Anterior Triangle.
Inferior border of the mandible
Midline
Anterior Border of SCM
Which muscle of the anterior triangle is most lateral: posterior belly of digastric or stylohyoid?
Posterior belly of digastric
Name the infrahyoid muscles. What are they innervated by?
Thyrohyoid Sternothyroid Sternohyoid Omohyoid Innervates by Ansa Cervicalis
Which vessels can be identified in the anterior triangle? Which one lies most medially?
Common carotid artery (Medial) and Internal Jugular Vein
Name the structures contained within the carotid sheath:
Internal Jugular Vein, Common carotid Artery, Vagus Nerve
On which nerve do C1 fibres traverse to reach the thyrohyoid muscle?
Hypoglossal
what is platysma?
Muscle of facial expression supplied by the facial nerve.
