Download Muscles of the Spine - Liberty Union High School District

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript
Muscles of the Spine
Latissimus Dorsi
• Origin:
• Spinous process of T6 through T12 and Lumbar vertebrae
• Insertion:
• Intertubercular groove of the Humerus
• Inferior portion of scapula
• Action:
• Lateral trunk flexion
• Anterior rotation of the pelvis
Trapezius
Trapezius
• Upper 1/3:
• Origin:
• Occipital protuberance
• Spinous process of C7
• Insertion:
• Distal/lateral 1/3 of Clavicle
• Acromion Process
• Action
• Elevation of Scapula
• Upward rotation of Scapula
• Rotation of Scapula to the opposite side
Trapezius
• Middle 1/3:
• Origin:
• Spinous processes of the 7th cervical vertebrae, & T1-T5
• Insertion:
• Acromion Process
• Spine of the scapula (superior-lateral border)
• Action:
• Retraction of scapula
• Fixation of thoracic spine
Trapezius
• Lower 1/3:
• Origin:
• Spinous processes & Supraspinal ligaments of T8-T12
• Insertion:
• Spine of Scapula (medial portion)
• Action:
• Depression of Scapula
• Retraction of Scapula
• Fixation of thoracic spine
Serratus Anterior
Serratus Anterior
• Origin:
• Anterior surface of the first 8-9 ribs
• Insertion:
• Anterior surface of medial border of scapula
• Action:
• Abducts (protracts) and upwardly rotates scapula; stabilizes scapula
Iliocostalis
• Origin:
• Iliac Crest, Ribs 3-12
• Insertion:
• Ribs 1-12, Transvers processes of C4-C7
• Actions:
• Laterally Flexes, extends the spine
Longissimus
• Origin:
• Common erector spinae tendon, Transverse processes of T1-T5, Articular
processes of C5-C6
• Insertion:
• Transverse processes of T3-T12, Ribs 1-12, Transverse processes of C2-C6,
Mastoid process of skull
• Actions:
• Extension & lateral bending of spine, extension of skull and cervical spine,
rotation of the face toward same side
Rhomboids
• Major:
• Origin:
• Spinous Processes of T2-T5
• Insertion:
• Vertebral border of scapula (lower 2/3)
• Minor:
• Origin:
• Spinous Processes of C7-T1
• Insertion:
• Vertebral border of scapula (upper 1/3)
• Actions:
• Retraction, elevation, downward rotation of scapula; Fixation of thoracic spine
Related documents