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Index
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Anaphy & Physiology
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MUSCULAR SYSTEM
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Pelvic floor and perineum & Scapula
level: Pelvic floor and perineum & Scapula
Questions and Answers List
level questions: Pelvic floor and perineum & Scapula
Question
Answer
Origin:Posterior pubis and ischial spine Insertion:sacrum and coccyx Action:Elevates anus,supports pelvic viscera
Levator ani
Origin:Central tendon of perineum Insertion:Dorsal surface of penis,base of clitoris Action:Constricts urethra,erects penis,erects clitoris
Bulbospongiosus
Origin:ischial ramus Insertion:corpus cavernosum Action:Constrict base of penis or clitoris
Ischiocavernosus
Origin:coccyx Insertion:central tendon of perineum Action:Keeps orifice of anal canal closed
External anal sphincter
Origin:Ischial ramus Insertion:midline connective tissue Action:Supports pelvic floor
transverse perinei deep
Origin:ischial ramus Insertion:central tendon of perineum Action:Fixes central tendon
transverse perinei Superficial
Origin:transverse processes of c1-c4 Insertion:Superior angle of SCAPULA Action:Elevates,retracts,and rotates scapula,laterally flexes neck
Levator scapulae
Origin:Ribs 3-5 Insertion:coracoid process of scapula Action:Depresses scapula or elevate ribs
Pectoralis minor
Origin:spinous process of t1-t4 Insertion:medial border of scapula Action:Retracts,rotates and fixes scapula
Rhomboids major
Origin:spinous process of t1-t4 Insertion:medial border of scapula Action:Retracts,slightly elevates,rotates,and fixes scapula
Rhomboids Minor
Origin:ribs 1-9 Insertion:medial border of scapula Action:Rotates and protracts scapula,elevates ribs
Serratus anterior
Origin:posterior surface of the skull and spinous process of c7-t12 Insertion:Clavicle,acromion process,and scapular spine Action:Elevates,depresses,retracts,rotates,and fixes scapula,extends neck
Trapezius