Module 2a
what is the origin, insertion and innervation of the bicep femoris?
o: long head: ischial tuberosity
short head: lateral lip of linea aspera of the femur
i: head of the fibula
nerve: sciatic
what is the origin, insertion and innervation of vastus lateralis?
O: lateral lip of linea aspera, gluteal tuberosity and greater trochanter
i: tibial tuberosity
inn: femoral
O, I, A & N of semimembranosus
o:ischial tuberosity
i:posterior aspect of the medial condyle of the tibia
a:flex knee, extend hip, tilt pelvis posteriorly, medially rotate the flexed knee, med rotate the hip
n: sciatic
which two muscles are innervated by the superior gluteal nerve?
gluteus medius
tensor fasciae latae
what is the proper name for the knee joint?
tibiofemoral joint
What is the origin, insertion & innervation of semitendinosus?
origin: ischial tuberosity
insertion: proximal, medial shaft of the tibia at pes anserinus tendon
nerve: sciatic
What is a muscles contractile unit?
OIAN of rectus femoris
o:AIIS
i: tibial tuberosity
a:extend the leg, flex the hip
n:femoral
the hamstrings all share the same actions, what are they?
flex leg, extend thigh
what is the proper name for the hip joint?
Which of the 4 quadricep muscles is the only one to cross two joints (hip and knee?)
rectus femoris
What are the actions of the Tensor Fascia latae?
1. flexes
2. abducts
3. medially rotates
which 3 of the quad muscles share the origin "linea aspera of femur"
vastus lateralis, vastus intermedius, vastus medialis
the hamstrings are all innervated by the same nerve - what is it?
sciatic
myofilaments, myofibril, muscle fiber, fascicle - is this list in order of largest to smallest or smallest to largest?
smallest to largest
What is the origin, insertion and innervation of adductor longus?
o: pubic tubercle
i: medial lip of linea aspera
nerve: obturator
what is the origin, insertion & innervation of vastus intermedius?
origin: anterior and lateral shaft of the femur
insertion: tibial tuberosity
nerve: femoral
the 4 quads are all innvervated by which nerve?
femoral
o: posterior iliac crest, sacrum and coccyx
i: lower fibers: gluteal tuberosity
upper fibers: iliotibial band
what is a motor unit?
which cells build bones?
which cells breakdown bones?
osteoblasts = bone building cells
osteoclasts= cells that breakdown bone tissue
What are the actions of gluteus medius?
all fibers:abduct
anterior fibers: flex, medially rotate
posterior fibers: extend, laterally rotate
the 4 quads all share the same insertion, what is it?
tibial tuberosity
which two muscles share the insertion of the iliotibial band (IT band) AKA the iliotibial tract
upper fibers of gluteus maximus, tensor fascia latae
what is the principle neurotransmitter involved in muscle contraction?
acetylcholine