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Triangles of the Neck (Sub Occipital Triangle (Borders (Medial (Rectus…
Triangles of the Neck
Sub Occipital Triangle
Borders
Medial
Rectus Capitus Posterior Major
Lateral
Obliquus capitis superior
Inferior
Obliquus capitis inferior
Roof
Semispinalis capitis
Floor
Posterior atlantooccipital membrane
Contents
Suboccipital Nerve/ C1
Innervates Muscles of SubOccipital Triangle /
Can cause tension headaches
Vertebral Artery
Supplies Spinal Cord and Brain
Muscles
Rectus Capitus Posterior Major
Origin/ Insertion
O:Nuchal Line I: S. Process C2
Obliquus capitis superior
Origin/ Insertion
O: Occiput I: C1 T.Process
Obliquus capitis Inferior
Origin / Insertion
O: T. Process C1 I: S. Process c2
Posterior Triangle
Borders
Anterior
Sternoclediomastoid
Posterior
Upper Trap
Inferior
Clavicle
Superior
Mastoid Process
Contents
Subclavian artery
Runs under clavicle, Supplies UE
Suprascapular artery
Supplies supraspinatus/ Infraspinatus
External Jugular Vein
Returns blood from head
Spinal Accessory
Supplies upper traps/ SCM
Brachial Plexus
Supplies UE
Muscles
Sternoclediomastoid
O: Clavicle/ Manubrium/Sternum I: Mastoid Process
Upper Trap
O: External Occipital Pertuberance I: Lateral Clavicle
Scalene MM Group
O: C2-C7 I: 1st and 2nd rib
Levator Scapulae
O:C1-C4 Vertbrea I: Medial Scapula
Anterior Triangle
Borders
Inferior
Jugular Notch
Posterior
SCM
Anterior
Midline of the Neck
Superior
Mandible
Muscles
Digastric
O: Mandible I: Hyoid
Mylohyoid
O:Mandible I: Hyoid
geniohyoid
O: Mandible I:Hyoid
stylohyoid
O:Styloid Process !: Hyoid
omohyoid
O:scapula I: Hyoid
Sternohyoid
O: Manubrium I: Hyoid
Thyrohyoid
O: Thyroid Cartilage !: Hyoid Bone
Sternothyroid
O:Manubrium I: Thryoid