Flashcards in Pelvis I Deck (21):
What are the bony landmarks of the Sacrum?
What are the gender differences between male and females in terms of false pelvis, pelvic inlet, inlet to toutlet, pelvic outlet, ischial tubes, sacrum, innominates and pubic symphysis?
false pelvis: Deeper (m); Shallow (f)
pelvic inletL Heart-shaped (m); oval (f)
inlet to outlet: longer (m); shorter (f)
pelvic outlet: smaller (m): larger (f)
ischial tubes: inverted (m); everted (f)
sacrum: narow, long (m); wider, shorter (f)
innominates: narrow (m); wide (f)
pubic symphysis: higher/cranial (m); lower/caudal (f)
What is the most common female type of pelvis and male type of pelvis?
Gynecoid = Most common female pelvis (AP = transverse)
Android = most common male type (heart shaped)
What are the intrinsic and extrinsic joints of the pelvis? What type of joint is it?
- pubic symphysis fibrocartilaginous joint
- sacroiliac joints = synovial joint
- lumbosacral junction = intervertebral articulation
- hip joints/Acetabulum = synovial ball-and-socket
What ligaments attach to the pelvis (true pelvis ligaments, accessory pelvis ligaments, etc..)?
True pelvis ligaments
Accessory pelvis ligaments
What is the function of the iliolumbar ligament?
Stabilizes the anterior motion of L5 and limits rotation (connects L5 to ilia)
What is the function of the sacrospinous ligament?
stabilizes the sacrum to prevent Anterior rotation of the sacrum around a transverse axis
What is the function of the sacrotuberous ligament?
stabilizes the sacrum to prevent Anterior rotation of the sacrum around a transverse axis.
True/False: There are muscles specific for movement of the sacroiliac joints.
False: There are NO muscles specific for movement of the sacroiliac joints; as motion there results from actions of muscles that function to move the back or legs.
What are the extrinsic pelvic muscles?
Abdominals (rectus abdominis)
Hip flexors, extensors, abductors, adductors (influence pelvic motion)
What is the major hip flexor?
Iliopsoas muscle (comprised of iliacus and psoas)
What muscles are hip extensors? Which one is the strongest extensor?
Hamstrings (semimembranosus & semitendonosus & Biceps femoris).
What muscles are hip adductors? Where do they attach?
Gracilis & Pectineus
All attach to the pubic ramus and the medial and/or posterior femur
What are major hip abductors? What is special of the abductors?
gluteus medius and gluteus minimus muscles.
Both have a few anterior fibers that depending on the position of the leg can internally and externally rotate the thigh.
What is the major hip external rotator? Are there any other muscles that externally rotate the hip?
Piriformis and also gluteus maximus (also a hip extensor)
What does the pelvis exam include when the patient is standing?
Observation (Static vs. gait)
Iliac crest and PSIS
Flexion tests (seated, standing, ilisacral vs. sacroiliac)?
What is examinable from the supine position?
What is examinable from the prone position?
What is the purpose and procedure for a standing flexion test?
Purpose: lateralize dysfunctions to a side. (+) tells us there is a somatic dysfuntions at the SI joint on the side that moves the most..
Procedure: Place thumbs under PSIS and tell the standing patient to touch their toes.
What are the possible somatic dysfunctions that could be diagnosed with a standing flexion test?
innominate, pubic, hip muscle imbalance dysfunction