gluteal region and hip bone Flashcards
what is trendelen berg gate?
unilateral paralysis of glut med causing a waddling to one side
what muscle compensates for glut med injury or paralysis? and what does it try to do?
abdominals, it tries to being rib cage closer to center of gravity or the side of the foot that is not affected?
what is the center of gravity when you are standing on one leg?
2 inches in front of S2
what 4 muscles make up superficial gluteal muscles
glut max med min and TFL
how would you stretch piriformis while sitting down and why lying prone
prone you medially rotate it while setting you cross legs or adduct (because the function of piriformis is different with hip at full flexion).
what is the calcar?
quadtrate turbercle between the greater and lesser trochanter of femur.
what are the two nerves that make up the sciatic nerve, and why is there “no such thing as a sciatic nerve”?
common fibular and tibial nerve. these nerves run together inside same connective tissue but there is no fibers that cross.
what is piriformis syndrome and what is the most common reason it happens?
sciatic nerve is comprised of two nerves, when you dont have the sciatic nerve (which is just common fibular and tibial nerve together) and they are jsut split often the common fibular nerve passes through the piriformis which creates problems
what would be a good way to know piriformis syndrome?
early 20’s no history of anything in back or anything. and they have signs of sciatica, it could be piriformis syndrome
what kind of joint is hip joint?
synovial ball in socket joint.
what is the function of the labrum acetabulum?
enhances depth of acetabulum
Increasing congruency. made of fibrocartilage
what happens till about age 10 or 11 when the round ligament gets damaged.
artery supplying head and neck of femur gets damaged and the head and neck dies.
does medial or lateral rotation bring more stability to the hip joint. how about adduction or abduction?
lateral rotation and abduction, because it stretches more ligaments, because stretching ligaments brings articulating surfaces together. (because both pubofemoral and illiofemoral are both anterior and only ischiofemoral is posterior) so two ligaments against one are stretched in these two positions.
what is weakest position of hip joint?
flexion, medial rotation and addiction, sitting with legs crossed lol
what significance do the three ligaments in the hip joint have in standing? and why?
COG is always posterior to hip joint. So COG forces pelvis into posterior tilt which stretches these ligaments (because of orientation) which stabilizes yourself upright, which is why you can stand for long periods of time (little muscle activation is needed)
What is the prime mover for hip extensor?
Glut max
what is IT band syndrome?
bursa of lateral knee sitting between IT band and tibia, when IT is tight it presses against it bursitis happens. You have to stretch it out.
prime mover of lateral rotation of thigh
quadrus femoris
where do gemelis inferior and superior lie on (posterior? ) side
above and below the obturator internus ligament.
Describe the location of superior glut n, inferior glut n, pudendal n, posterior cutaneous n, and sciatic nerve in relation to piriformis?
superior glut going up, inferior glut below, sciatic below and super big, posterior cutaneous is parallel with sciatic and smaller, pudendal goes through obt foramen
what is an anastamosis?
arteries that join together
what are the contents of cruciate anastamosis?
medial fem circumflex, lat fem circumflex, first perforating, inferior glut
which artery supplies teres lig before the age of 12?
acetabular branch of obturator artery
what does avcascular necrosis lead to in the femur and acetabulum?
when the bone doesn’t receive blood.. Can be reversed but at the time of repair it is very vulnerable to mechanical stress. This leads to flatting of head of femur that ends up grinding on the acetabulum
