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Origin/Insertion/Function of Pelvis/Trunk

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BR8700
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Last updated: October 21, 2025
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First submittedOctober 17, 2025
Times taken11
Average score25.6%
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Pelvic Floor Fucntion
Supports pelvic viscera and Supports pelvis and volitional control of bowel and bladder and reproductive function and bracing during lifting
Psoas Major Origin
Bodies/ Transverse Processes of TXII-LV
Psoas Major Insertion
Lesser Trochanter
Psoas Major Function
Hip Flexion and lateral hip rotation
Iliacus Origin
Iliac Fossa
Iliacus Insertion
Lesser Trochanter
Iliacus Function
Hip Flexion and lateral hip rotation
Tensor Fascia Latae Origin
Anterior Iliac crest
Tensor Fascia Latae Insertion
Gerdy’s tubercle via Iliotibial tract
Tensor Fascia Latae Function
Hip abduction, flexion and medial rotation and stabilizes knee
Gluteus Maximus Origin
Posterolateral Ilium and sacrum/coccyx
Gluteus Maximus Insertion
IT band and gluteal tuberosity
Gluteus Maximus Function
Hip extension, Abduction and lateral rotation and stabilizes lateral hip and knee
Gluteus Medius Origin
Lateral ilium
Gluteus Medius Insertion
Greater trochanter
Gluteus Medius Function
Hip extension, Abduction and lateral rotation and stabilizes lateral hip and knee
Piriformis Origin
sacrum
Piriformis Insertion
greater trochanter
Piriformis Function
lateral hip rotation
Femoral triangle base
inguinal ligament
Femoral triangle Medial margin
adductor longus
Femoral triangle lateral margin
sartorius
Intercostals Origin
inferior part of rib above
Intercostals Insertion
superior part of rib below
Intercostals Function
respiration and moves ribs superiorly and inferiorly
External Oblique Origin
lower ribs (bottom 6-8)
External Oblique Insertion
iliac crest and linea alba
External Oblique Function
trunk flexion and side flexion and rotation and compresses abdomen for respiration
Internal Oblique Origin
Thoracolumbar fascia and Iliac crest and Inguinal ligament
Internal Oblique Insertion
Lower ribs and linea alba
Internal Oblique Function
trunk flexion and side flexion and rotation and compresses abdomen for respiration
Rectus Abdominis Origin
pubis bone
Rectus Abdominis Insertion
Distal sternum and Costal cartilages of the ribs
Rectus Abdominis Function
Trunk flexion and Aids in expiration/ compresses abdomen
Diaphragm Origin
Distal sternum and Inner surface of lower rib cage and Lumbar vertebrae bodies
Diaphragm Insertion
central tendon of diaphragm
Diaphragm Function
respiration (contracts down to open lungs)
Rhomboid (Major/Minor) Origin
Spinous process of CVII to TV
Rhomboid (Major/Minor) Insertion
Medial border of scapula
Rhomboid (Major/Minor) Function
Retract and elevate scapula
Erector Spinae Origin
Sacrum and Iliac crest and Spinous process/ Transverse process of all cervical, thoracic, and lumbar vertebrae and Angles of all 12 ribs
Erector Spinae Insertion
Mastoid process of Temporal bone and Posterior surface of occipital bone Spinous process/ Transverse process of all cervical, thoracic and lumbar vertebrae. and Angles of all 12 rib
Erector Spinae Function
Act as the primary extensors of vertebral column and head. and Acting unilaterally, can side flex vertebral column.
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