Posterior Triangle Flashcards
What is the anterior boundary of the triangle of the neck?
a vertical line along the midsagittal plane of the neck
What is the posterior boundary of the triangle of the neck?
the anterior border of the trapezius
What is the superior boundary of the triangle of the neck?
the inferior border of the skull (mandible, temporal, and occipital bones)
What is the inferior boundary of the triangle of the neck?
the superior border of the clavicle
What divides the triangle of the neck into the anterior and posterior triangles?
the sternocleidomastoid
What is the anterior boundary of the posterior triangle?
the posterior border of the sternocleidomastoid
What is the posterior boundary of the posterior triangle?
the anterior border of the trapezius
What is the superior boundary of the posterior triangle?
the superior nuchal line and the origin of the sternocleidomastoid
What is the inferior boundary of the posterior triangle?
the middle third of the clavicle
What is the floor of the posterior triangle?
- splenius capitis
- levator scapulae
- posterior scalene
- middle scalene
- possibly anterior scalene
What features are observed in the posterior triangle?
- spinal accessory nerve
- cervical nerve plexus, ventral primary rami C1-C4
Which ramus contributes to the lesser occipital nerve? Where does it receive SA fibers from?
- ventral primary ramus C2
- scalp behind the ear
Which rami contribute to the greater auricular nerve? Where does it receive SA fibers from?
- ventral primary rami of C2 and C3
- scalp around the ear
Which rami contribute to the transverse cervical nerve? Where does it receive SA fibers from?
- ventral primary rami C2 and C3
- anterior triangle of the neck
Which rami contribute to the supraclavicular nerve? Where does it receive SA fibers from?
- ventral primary rami C3 and C4
- shoulder and upper chest
