Exam 2: Lower Limb lecture vi Flashcards
gluteal muscles: piriformis origin
anterior sacrum
gluteal muscles: piriformis insertion
to greater trochanter
gluteal muscles: piriformis innervation
nerve to piriformis
gluteal muscles: piriformis action
laterally rotate thigh; stabilize hip joint
what nerve emerges just inferior to the piriformis
sciatic nerve
gluteal muscles: obturator internus, superior gemellus, and inferior gemellus: origin for all 3
from bone surrounding obturator membrane, ischial spine, and ischial tuberosity
gluteal muscles: obturator internus, superior gemellus, and inferior gemellus: insertion for all 3
to greater trochanter
gluteal muscles: obturator internus, superior gemellus, and inferior gemellus: actions
lateral rotation of thigh and stabilization of hip joint
gluteal muscles: quadratus femoris origin
ischial tuberosity
gluteal muscles: quadratus femoris insertion
to intertrochanteric crest
gluteal muscles: quadratus femoris innervation
nerve to quadratus femoris
gluteal muscles: quadratus femoris action
lateral rotation of thigh and hip stabilization
posterior thigh muscles: the _, except for the short head of
the hamstrings, except for the short head of biceps femoris
posterior thigh muscles: originate on the _ deep to _
except short head of biceps femoris; originate on the ischial tuberosity deep to gluteus maximus
posterior thigh muscles: insert on
except short head of biceps femoris; insert on the bones of the leg
posterior thigh muscles: span _ joints, extending the _ and flexing the _
except for the short head of biceps femoris; span 2 joints, extending the hip and flexing the knee
posterior thigh muscles: are innervated by the _ division of the _ nerve
except for short head of biceps femoris; are innervated by the tibial division of the sciatic nerve
posterior thigh muscles: semitendinosus origin
ischial tuberosity
posterior thigh muscles: semitendinosus insertion
to medial surface of superior tibia
posterior thigh muscles: semitendinosus innervation
tibial division of sciatic nerve
posterior thigh muscles: semitendinosus action
extend thigh; flex leg
posterior thigh muscles: semimembranosus origin
ischial tuberosity
posterior thigh muscles: semimembranosus insertion
to posterior part of medial tibial condyle and lateral femoral condyle as OBLIQUE POPLITEAL LIGAMENT
posterior thigh muscles: semimembranosus innervation
tibial division of sciatic nerve
posterior thigh muscles: semimembranosus action
extend thigh; flex leg
posterior thigh muscles: biceps femoris action
long head only: extend thigh
short head: flex leg
posterior thigh muscles: biceps femoris long head origin
ischial tuberosity
posterior thigh muscles: biceps femoris long head insertion
to head of fibula
posterior thigh muscles: biceps femoris long head innervation
tibial division of sciatic nerve
posterior thigh muscles: biceps femoris short head origin
linea aspera and lateral supracondylar line of femur
posterior thigh muscles: biceps femoris short head insertion
to head of fibula
posterior thigh muscles: biceps femoris short head innervation
common fibular division of sciatic nerve
lumbar plexus (in abdominopelvic cavity) formed by contributions from the ventral rami of spinal nerves _
lumbar 1 through 4
lumbar plexus branches include (3 that we’re learning)
- femoral nerve (most anterior thigh muscles)
- obturator nerve (medial thigh muscles)
- part of the lumbosacral trunk
sacral plexus (in abdominopelvic cavity): located on _
posterior wall of lesser pelvis
sacral plexus (in abdominopelvic cavity): formed by contributions from the ventral rami of spinal nerves _
lumbar 4, lumbar 5, and sacral 1 through sacral 4
sacral plexus (in abdominopelvic cavity): lumbosacral trunk is formed by part of the _ nerve united with the _; it contributes to the _ plexus
part of the L4 nerve united with the ventral ramus of the L5 nerve; contributes to the sacral plexus
sacral plexus (in abdominopelvic cavity): fibers of the ventral (anterior) division that form the _ nerve go on to form the _ nerve
sciatic nerve go on to form the tibial nerve
sacral plexus (in abdominopelvic cavity): fibers of the dorsal (posterior) division that form the _ nerve go on to form the _ nerve
sciatic nerve go on to form the common fibular nerve
everything from the knee down is supplied by the _ nerve
sciatic nerve
sacral plexus: major nerves we are learning (7) hint: nerves to gluteal muscles + 3 others
- superior gluteal nerve
- inferior gluteal nerve
- nerve to piriformis
- sciatic nerve
- nerve to quadratus femoris
- posterior femoral cutaneous nerve (posterior cutaneous nerve of thigh)
- pudendal nerve
perineum (space btwn the legs) nerves: pudendal nerve is the chief sensory nerve of the _; it is in the _ region only briefly and then leaves it to enter the perineum
external genitalia; in the gluteal region only briefly
only the _ rami that forms plexuses
ventral (anterior)
gluteal and posterior thigh regions: nerves in these regions nearly all rise from the _ except _
sacral plexus except the clunial nerves
gluteal and posterior thigh regions: clunial nerves are (superficial/deep?) and supply the skin of _
superficial; supply skin of buttocks
gluteal and posterior thigh regions: superior gluteal nerve leaves pelvis through _; supplies _ (3 muscles)
leaves pelvis through greater sciatic foramen; supplies gluteus medius, gluteus minimus; tensor fasciae latae
gluteal and posterior thigh regions: inferior gluteal nerve leaves pelvis through _; supplies _ (1 muscle)
leaves through greater sciatic foramen; supplies gluteus maximus
gluteal and posterior thigh regions: sciatic nerve is the continuation of the
main part of the sacral plexus
gluteal and posterior thigh regions: sciatic nerve leaves pelvis through
greater sciatic foramen
gluteal and posterior thigh regions: sciatic nerve is really 2 nerves, _ and _, which are loosely bound together in the same connective tissue sheath
tibial nerve and common fibular nerve
gluteal and posterior thigh regions: sciatic nerve does not supply
any structures in the gluteal region
gluteal and posterior thigh regions: sciatic nerve does supply
posterior thigh muscles, all muscles of the leg and foot, skin of most of the leg and foot, and all lower limb joints
gluteal and posterior thigh regions: nerve to quadratus femoris supplies (3)
hip joint, inferior gemellus, and quadratus femoris
gluteal and posterior thigh regions: posterior (femoral) cutaneous nerve of thigh supplies (5)
skin of buttocks, posterior thigh, posterior calf, lateral perineum; and upper medial thigh
