Superficial and Deep Back Flashcards
Supraspinous Ligament
Connects tips of adjacent spinous processes
Ligamentum Nuchae
Nuchal Ligament, connects tips of spinous processes at cervical levels.
Extrinsic Superficial Muscles
Trapezius, Latissimus Dorsi, Levator Scapulae, Rhomboid Major and Minor
Extrinsic Intermediate Muscles
Serratus Posterior Superior and Inferior
Proximal Attachments of Trapezius
Superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of C7-T12
Distal Attachments of Trapezius
Clavicle, acromion, scapular spine
Actions of Trapezius
Elevation, rotation, depression, of scapula; rotation of glenoid fossa superiorly.
Innervation of Trapezius
Cranial Nerve XI, Spinal Accessory Nerve
Blood Supply of Trapezius
Transverse Cervical Artery
Proximal Attachments of Latissimus Dorsi
Spinous processes T7-T12, thoracolumbar fascia, iliac crest
Distal Attachments of Latissimus Dorsi
Floor of intertubercular sulcus of humerus
Actions of Latissimus Dorsi
Extension, adduction, medial/internal rotation of humerus; lifts body toward arm in climbing
Levator Scapulae Proximal Attachment
Transverse Processes, C1-C4
Levator Scapulae Distal Attachments
Superior angle of scapula
Levator Scapulae Innervation
Dorsal Scapular Nerve
Levator Scapulae Blood Supply
Dorsal Scapular Artery
Rhomboid Minor Proximal Attachments
Nuchal Ligament, Spinous processes of C7 and T1
Rhomboid Major Proximal Attachments
Spinous processes of T2-T5
Distal attachment of Rhomboid Major
Medial border of scapula below spine
Distal attachment of Rhomboid Minor
Medial border of scapular above spine
Action of Serratus Posterior Superior
Elevation of Ribs
Action of Serratus Posterior Inferior
Depression of Ribs
Border of Triangle of Auscultation
Trapezius, Latissimus Dorsi, Scapula
Border of Lumbar Triangle of Petit
Latissimus Dorsi, External Obliques, Iliac Crest
Spinotransverse Muscles
Splenius Capitus and Splenius Cervicis
Action of Spinotransverse muscles
Unilateral produces lateral flexion of neck and rotation of head to side of contraction. Bilateral produces head and neck extension.
Erector Spinae Muscles
Iliocostalis, Longissimus, Spinalis
Action of Erector Spinae Muscles
Unilateral contraction produces lateral flexion, bilateral contraction produces extension.
Transverso-Spinal Muscles
Semispinalis, Multifidus, Rotators
Semispinalis
Spans 4-6 vertebrae, most developed in cervical, attaches to C2
Multifidus
Spans 2-4 vertebrae, most developed in lumbar. Deep to erector spina muscle mass
Rotators
Spans 1-2 vertebrae, most developed in thoracic region.
Action of semispinalis
extension of vertebral column (semispinalis cervicis) and head (semispinalis captius)
Action of Multifidus
Unilateral contraction rotates to contralateral side; stabilizes vertebrae
Action of Rotators
Extension and rotation of vertebral column
Innervation of intrinsic back muscles
Dorsal/Posterior Rami of Spinal Nerves
Innervation of extrinsic back muscles
Ventral/Anterior rami of Spinal Nerves
Borders of suboccipital triangle
rectus capitus posterior major, obliquus captius superior, obliquus capitus inferior.
Floor of suboccipital triangle
Formed by posterior arch of C1 and posterior atlanto occipital membrane
Vertebral Artery
Contained in suboccipital triangle. Also contains suboccipital nerve
What are the 8 wrist bones?
Scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
Primary arterial supply of upper limb
Subclavian artery
Branch of subclavian artery that supplies muscles of scapula via suprascapular and transverse cervical arteries
Thyrocervical trunk
What does the subclavian artery become after crossing the lateral body of the first rib?
Axillary Artery
What does the axillary artery become when it crosses the lower border of teres major?
Brachial artery
What does the brachial artery give rise to?
Deep brachial artery, superior and inferior ulnar collateral arteries
What does the brachial artery split into? Where does it split?
Anterior to the elbow the brachial artery becomes the radial and ulnar arteries.
What joins the basilic and cephalic veins?
Median cubital vein