Proximal
Deltoid
Rectus capitis lateralis
Transverse process of atlas
Pectoralis Minor
Medial pectoral nerve (C8, T1)
Pectoralis Major
Adducts and medially rotates humerus, draws scapula anteriorly and inferiorly
Functional type of fibers for CN V
Mixed - Motor root & Sensory root
Levator Scapulae
Posterior tubercles of transverse processes of C2-C6 vertebrae
Serratus Anterior
Anterior surface of medial border of scapula
Platysma
Cervical branch of facial nerve (CN VII)
Posterior scalene
Flexes neck laterally, elevates 2nd rib during forced inspiration
Suboccipital triangle
Obliquus capitis inferior
Obliquus capitis superior
Rectus capitis posterior major
Semispinalis capitis
Posterior atlanto-occipital membrane & posterior arch of vertebra C1
Rectus capitis lateralis
Jugular process of occipital bone
Semispinalis
Occipital bone and spinous processes in thoracic and cervical region
Trapezius
Spinal accessory nerve (CN XI) - Motor
C3, C4 spinal nerves - Pain & proprioception
Rhomboid Minor and Major
Retract scapula and rotate its glenoid cavity inferiorly, fix scapula to thoracic wall
Sensory roots of CN V
Opthalmic nerve
Maxillary nerve
Mandibular nerve
Subclavius
Junction of 1st rib and its costal cartilage
Splenius capitis
Lateral aspect of mastoid process and lateral third of superior nuchal line
Posterior and anterior rami of spinal nerves
Intertransversarii
Latissimus Dorsi
Extends, adducts, and medially rotates humerus
Divisions that form the medial cord
Anterior division of the inferior trunk
Longus Colli
Anterior tubercle of C1, bodies of C2-C3, and transverse processes of C3-C6 vertebrae.
Teres major
Medial lip of intertubercular sulcus of humerus
Levator Scapulae
Dorsal Scapular (C4, C5)
C3 & C4 Cervical nerves
Subscapularis
Medially rotates arm: as part of rotator cuff
helps hold head of humerus in glenoid cavity
Axiallary nerve entrapment site
Quadrangular space:
Teres minor
Teres major
Triceps brachii long head
Humerus