Suboccipital Triangle Flashcards
(18 cards)
Primary Curves of the Spine
Kyphosis (hunchback) Thoracic and Sacral
Secondary Curves of the Spine
Lordosis (saddleback) Cervical and Lumbar
Number of Vertebrae in Each Section
Cervical: 7
Thoracic: 12
Lumbar: 8
Sacrum: 5 Fused
Superficial Muscles of the Back
Trapezius
Latissimus Dorsi
Rhomboid Major
Rhomboid Minor
Levator Scapulae
Semispinalis Capitis
Splenius Capitis
Neurovascular Supply of Occipital Region
Greater Occipital Nerve (C2): in subcutaneous tissue, inferiolateral to external occipital protuberance
Occipital artery and vein: in subcutaneous tissue, lateral to greater occipital nerve
Occipital Nerve (C3): lower, and lateral to midline at C3
Suboccipital Triangle
medial: Rectus Capitis posterior major
(also Rectus capitis posterior minor)
Inferior: Obliquus capitis inferior
Lateral: Obliquus capitis superior
suboccipital nerve C1 runs through it
vertebral artery present
Trapezius
Origin: Occipital Bone, Spinous Processes of vertebrae (to lower thoracic)
Insertion: Scapula and clavicle
Innervation: Accessory + C3 + C4
Movement: rotation elevation depression of scapula
Latissimus Dorsi
Origin: Spinous Processes T7-L5, Illiac Crest
Insertion: Proximal Humerus
Movement: Adduction and internal rotation of Arm
Rhomboid Major
Origin: Spinous Process of T2-T5
Insertion: Medial Border of Scapula
Action: retraction and depression of scapula
Innervation: Dorsal Scapular n.
Rhomboid Minor
Origin: Spinous Process of C7 -T1
Insertion: Medial Border of Scapula
Innervation: Dorsal Scapular n.
Action: Retract and Rotate Scapula
Levator Scapulae
Origin: Trasnverse Processes of C1-C4
Insertion: Superior part of medial border of scapula
Innervation: Cervical nerve/ Dorsal Scapular nerve
Movement: elevation of scapula
Splenius Capitus
Origin: Nuchal Ligaments and Spinal Processes
Insertion: Mastiod Process
Innervation: C3/C4
Action: Extend, Rotate, Lateraly Flex Head
Semispinalis Capitis
Origin: Transverse processes of lower cervical and upper thoracic vertebrae
Insertion: between nuchal lines
Nerve: Greater Occipital nerve (C2)
Action: extends the head
*Pierced by C2*
Obliquus Capitus Superior
Obliquus Capitus Inferior
Obliquus Capitus Superior:
transverse process of C1 –> occipital bone
Obliquus Capitus Inferior:
spinous process of C2 –> Transverse process of C1
Rectus Capitus Posterior Minor
Rectus Capitus Posterior Major
Rectus Capitus Posterior Minor:
posterior tubercle of C1 –> occipital bone
Rectus Capitus Posterior Major:
Spinous Process of C2 –> occipital bone
