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Gluteal Region and Hip Joint
Rinaldi 2/9/11 lecture (second)
41
Anatomy
Undergraduate 4
02/09/2011

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Term
support period of step cycle
Definition
heel strike to toe off
Term
swing period of step cycle
Definition
toe off to heel strike
Term
support and swing phases
Definition
two parts of the step cycle
Term
lesser gluteals
Definition
muscles active at heel strike but not all the way to toe off, keep center of gravity over the support leg by using Abductors to hold straight
Term
lesion to superior gluteal nerve-> can't use the glutes so the person throws their body weight over the supporting leg

also arthritis pain can cause this gait
Definition
what causes Trendelenberg gait
Term
lift the leg of the unsupported side then they fall on their leg
Definition
positive trendelenberg sign
Term
lift the leg of the unsupported side then they fall on their leg
Definition
positive trendelenberg sign
Term
active very briefly in support phase
Definition
when is the role of gluteus maximus in gait cycle?
Term
Gluteus maximus
Definition
catches you to prevent jack-knife of upper body over lower limbs in heel strike, if messed up the person will lean back at heel strike
Term
iliofemoral ligament
Definition
V shaped thickening of fibrous joint capsule, resists hyperextension of hip when standing
Term
pubofemoral ligament
Definition
ligament below the axis of rotation of the hip joint so it resists hyperabduction
Term
ischiofemoral ligament
Definition
ligament attaches to femur anteriorly, resists hyperextension of hip
Term
1) medial circumflex femoral
2) lateral circumflex femoral
3) artery to the head of the femur (from obturator artery)
Definition
blood supply to the head and neck of femur is derived from what 3 vessels?
Term
it is a secondary center of ossification and so it is separate from the rest of the femur at a young age
Definition
why does the head of the femur have a special blood supply?
Term
profunda femoris (aka deep artery of thigh)
Definition
what are the medial and lateral circumflex femoral branches of?
Term
retinacular artey = femoral neck artery
Definition
what artery flows through the neck of the femur
Term
80
Definition
in __ % of adults the retinacular arteries anastomose with the artery to the head
Term
age 12-14 when the ossification of the femur has extended into the pit
Definition
when does the anastamoses between the head of the femur and the branches of the profunda occur?
Term
if the retinacular arteries are torn during a fracture of the neck, there may be aseptic vascular necrosis
Definition
why is it bad if your retinaculr arteries don't anastamose with the profunda femoris arteries?
Term
old people-> break the femur and it won't heal because of lack of blood supply
Definition
who is especially susceptible to avascular necrosis on the head of the femur?
Term
fascia lata
Definition
aka tough deep fascia of the lower limb
Term
pubic bone, iliac crest, inguinal ligament, and other bony/ligamentous structures
Definition
what is the fascia lata attached to in the gluteal region?
Term
inguinal ligament (no continuous fascial tract = no spread of infection-or not as easy)
Definition
what separates the deep fascia of the leg from the abdomen?
Term
ilio tibial tract
Definition
thickening of the fascia lata on the lateral thigh
Term
iliotibial tract
Definition
allows the hip muscles to act on the knee
Term
continuous with the crual fascia
Definition
what is the iliotibial tract continuous with distally?
Term
gluteus maximus
Definition
largest and most superficial muscle
Term
piriformis
Definition
muscle border that is key to naming stuff in the gluteal region
Term
through greater sciatic foramen superior to piriformis
Definition
where do superior gluteal NAV pass around the piriformis?
Term
through greater sciatic foramen inferior to piriformis
Definition
where does the inferior gluteal NAV pass in relation to the piriformis
Term
passes through greater sciatic foramen inferior to piriformis (80-90% of the time sometimes splits)
Definition
where does the sciatic nerve pass in relation to the piriformis (most of the time)
Term
pudendal nerve/internal pudendal AV pass through the greater sciatic foramen inferior to piriformis then into the pelvis through the lesser sciatic foramen (the nerve goes out around the pelvic diaphragm then back in with the vessels)
Definition
where does the pudendal nerve pass in relation to the piriformis?
Term
peroneum between the legs (its a branch of the lumbosacral plexus)
Definition
what does the pudendal nerve innervate?
Term
87-inferior
12.2-through
0.5-superior
Definition
in 87% of patients, the entire sciatic nerve passes ______ to the piriformis.

in 12.2% the peroneal division passes ________ the piriformis

in 0.5% of patients the peroneal division passes ______ to the piriformis
Term
half way between posterior superior iliac spine (sacral dimple) and the ischial tuberosity
Definition
where does the sciatic nerve emerge from the greater sciatic foramen?
Term
half way between, follows a half circle path down.
Definition
where does the sciatic nerve pass in regards to the greater trochanter and ischial tuberosity?
Term
upper outer quadrant
Definition
where is the only safe place to do an intragluteal injection?
Term
gemellus superior and gemellus inferior
Definition
what things insert on the tendon of obturator internus
Term
1)glut. maximus
2)piriformis
3)quadratus femoris
4)gemellus superior
5)obturator internus
6)gemellus inferior
7)obturator externus
Definition
what are the lateral rotators of the thigh?
Term
lateral rotators of the thigh

1)obturator internus (both gemelli)
2)obterator externus
3)piriformis
4)gluteus medius
5)gluteus minimis
Definition
what things insert on the greater trochanter?
Term
tensor fascia latae & glut med. and min.
Definition
what muscles are innervated by superior gluteal n.?
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