Human Body Unit I Flashcards
The erector spinae muscles are positioned __________ to the transversospinalis muscles
superficial
The ________ ______ passes anterior to the hip joint and posterior to the inguinal ligament.
femoral nerve
The external iliac artery passes ______ to the inguinal ligament
posterior
The femoral artery passes ________ to the sartorius muscle
posterior (deep)
The ____ _______ muscles are positioned superficial to the transversospinalis muscles
erector spinae
The femoral nerve passes _________ to the hip joint and _______ to the inguinal ligament
anterior/posterior
The ______ _______ passes posterior to the inguinal ligament.
external iliac artery
At the inguinal ligament, the femoral artery is _______ to the femoral vein and ______ to the femoral nerve.
lateral/medial
Within the femoral triangle the iliopsoas muscle is positioned _____________ to the femoral nerve, artery, and vein.
directly posterior (deep)
At the level of the femoral triangle, the pectineus muscle is positioned directly ______ to the femoral nerve, artery, and vein.
posterior (deep)
The lateral circumflex femoral artery passes ______ and __________ to the femur.
anterior and lateral
The medial circumflex femoral artery passes directly __________ to the pectineus muscle.
lateral
The medial circumflex femoral artery passes directly ________ to the iliopsoas muscle.
medial
So, the medial circumflex femoral artery is ______ to the pectineus but _____ to the iliopsoas
lateral/ medial
The obturator nerve passes ________ to the superior pubic ramus.
directly inferior
While we’re on the subject, what does the obturator nerve innervate?
adductor brevis, adductor magnus, adductor longus, gracilis, and obturator externus
The adductor brevis muscle is _________ and __________ to the adductor longus and __________ to the adductor magnus muscle.
posterior/superior/anterior
What action do all those 3 muscles share?
adduction of the thigh
What different actions do those adductor muscles have?
adductor brevis= just thigh adduction
adductor longus= adduction and thigh flexion
adductor magnus= adduction and thigh extension
What leg compartment do these 3 muscles fall under?
medial femoral muscles
What are all the medial femoral muscles, and what are they mainly innervated by?
adductor brevis, longus, magnus, gracilis, petineus, obturator externus/ obturator nerve
What are the exceptions?
adductor magnus is obturator nerve and tibial division of sciatic nerve; pectineus is femoral nerve, and accessory, and optional of obturator n. being present
So if you had a nerve lesion to the obturator n., what are some muscular movements you would have difficulty performing?
thigh adduction, flexion of the thigh, extension of the leg, medially rotating the leg, and laterally rotating the thigh
The profunda femoral artery is positioned ________ to the adductor magnus muscle.
anterior
Profunda femoral a. supplies all the medial muscles of the thigh except the _______ and ________ _________
pectineus/obturator externus
The medial perforating branches of the profunda femoris artery pass _______ and _______ to the shaft of the femur.
medial/posterior
The gluteus maximus is __________ to the gluteus minimis.
superficial
What muscles does the profunda femoral a supply?
Anterior and medial compartments of muscles: For anterior the vastus intermedius and vastus medialis. For medial the adductor brevis, adductor longus and adductor magnus
What about the perforating branches of the profunda femoral a. ?
They supply the posterior compartments of the leg: biceps femoris, semimembranosus, and semitendinosus.
The gluteus medius muscle is __________ to the piriformis.
superior
The piriformis muscle is __________ to the gluteus medius.
inferior
The gluteus minimis is __________ deep to the gluteus maximus muscle.
deep
Where does the piriformis attach?
From the anterolateral sacrum to the upper border of the greater trochanter. (From the anterior and lateral side of the sacrum to the greater trochanter of the femur)
The inferior gluteal artery and nerve pass directly ________ to the piriformis muscle.
inferior
The piriformis muscle is __________ to the inferior gluteal artery and nerve.
superior
The sciatic nerve is ______ to the gluteus maximus muscle and __________ to the piriformis muscle.
deep (anterior)/ inferior
The piriformis muscle is supplied by what nerve?
S2
What if that nerve were to be lesioned?
There would be difficulty in abducting and laterally rotating the thigh.
The gluteus medius muscle is __________ to the gluteus minimis.
superficial
The gluteus minimis is__________ to the gluteusmedius
deep
The superior gluteal artery and nerve pass __________ to the piriformis and __________ to the gluteus minimus.
superior/ superficial
What does the superior gluteal n. innervate?
gluteus minimus, medius, and tensor fascia latae
What would happen if that nerve was lesioned?
Abduction, medial rotation of the leg, and the ability to stabilize the pelvis would be impaired, as well as leg extension would be difficult to do
Tensor fascia latae is in the _______ muscle compartment of the leg while the glut. min and med are in the __________ region of the leg
anterior/gluteal
Are they supplied by similar arteries?
Yes, the lateral circumflex femoral a., superior gluteal a., and tensor is also supplied by the superficial circumflex iliac a.
The piriformis is __________ to the tendon of the obturator internus (and gemelli muscles).
superior
The tendon of the obturator internus is__________ to the piriformis muscle.
inferior
The sacrotuberous ligament passes __________ to the sacrospinous ligament.
posterior (superficial)
The sacrospinous ligament passes __________ to the sacrotuberous ligament.
anterior
Where does the sacrotuberous ligament attach?
It goes from the ilium (posterior) to the ischial tuberosity
What muscles attach to the sacrotuberous ligament?
Erector spinae and gluteus maximus
Where does the sacrospinous ligament attach?
From the ischial spine to the lateral margin of the sacrum
The obturator internus muscle passes _________ to the sacrospinous ligament.
inferior
The obturator internus muscle passes _________ to the sacrotuberous ligament.
anterior (deep)
The tendon of the obturator internus (and gemelli) muscles is positioned _________ to the quadratus femoris muscle.
superior
The quadratus femoris muscle is _________ to the tendon of the obturator internus muscle and gemelli muscles.
inferior
What innervates the obturator internus?
sacral plexus nerves
What supplies the obturator internus?
obturator a. and internal pudendal artery
What is the function of this nerve?
sensory, postganglionic sympathetic, and motor innervation obturator internus and superior gemellus
The tendon of the obturator internus muscle passes _________ to the neck of the femur
posterior
The obturator externus muscle passes also passes _________ to the neck of the femur.
posterior
The tendon of the obturator externus muscle is _________ to the tendon of the obturator internus.
directly inferior
The tendon of the obturator internus muscle is _________ to the tendon of the obturator externsu muscle.
superior
Where does the obturator externus muscle attach?
From the external aspect of the rim of the obturator foramen to the trochanteric fossa.
Where is the trochanteric fossa?
It is located on the greater trochanter
What attaches to the trochanteric fossa?
obturator internus and externus m.
The sciatic nerve passes _________ to the obturator internus tendon, and gemelli and quadratus femoris muscles
posterior
At mid-thigh, the sciatic nerve is _________ to the shaft of the femur and _________ to the hamstring muscle.
posterior/ deep
What are the two divisions of the sciatic nerve?
Tibial division and peroneal division
What muscles does the sciatic n. innervate via the tibial division?
semimembranosus, semitendinosus, biceps femoris (long head) and adductor magnus m.
What are the divisions of the tibial nerve?
sural nerve, muscular branches, medial plantar n, and lateral plantar n.
What does the peroneal nerve branch of the sciatic nerve innervate?
short head of the biceps femoris
What are the branches of the fibular nerve?
lateral sural n, deep fibular n, superficial n.
Within the popliteal fossa, the common peroneal nerve is _________ to the tibial nerve
lateral
Within the popliteal fossa, the tibial nerve is _________ to the common peroneal nerve.
medial
The sural nerve passes _________ to the fibula (lateral malleolus)
posterior
What is the function of the sural nerve?
To innervate the skin that overlies the lateral leg and foot and provide sensory and post ganglionic sympathetic innervation.
The tibial nerve passes _________ to the knee joint.
posterior
The popliteal artery is _________ to the knee joint
posterior
So, the tibial nerve and popliteal artery both pass _________ to the knee joint.
posterior
The tendon of the tibialis posterior muscle passes _________ to the tibia (medial malleolus).
posterior
At the ankle, the tendon of the flexor digitorum longus muscle is _________ -_________ to the tendon of the tibialis posterior muscle.
posterior-lateral
What compartment does the tibial nerve innervate?
Posterior leg compartment
What muscles are those specifically?
flexor hallucis longus, gastrocnemius, plantaris, popliteus, soleus, and tibialis posterior, flexor digitorum longus
Does the tibial nerve innervate ALL the posterior muscles then?
Yes
The popliteal artery gives rise to what other arteries?
medial superior genicular, lateral superior genicular, medial and lateral sural, medial inferior genicular a., lateral inferior genicular a., anterior and posterior tibial artery
Where does the tibialis posterior muscle attach?
From interosseous membrane, lateral tibia and medial fibula to the medial tarsals and metatarsals
Where does flexor digitorum longus attach?
Posterior tibia distal to the soleal line to the plantar surface of the distal phalangeal bases.
What are some of the main actions of the posterior crural muscles?
plantar flexion at the ankle, flexing MP and IP digits of the toes, leg flexion
The popliteus, although a posterior compartment muscle, has only one action of….what?
unlocking the knee during initial flexion
The tibalis posterior, while it also plantar flexes the ankle is going to also…..
invert the foot.
The tendon of the flexor digitorum longus muscle is _________ -_________ to the tendon of the flexor hallucis longus muscle.
anterior-medial
Where does flexor hallucis longus attach?
The distal posterior fibular surface and interosseous membrane to the plantar aspect of the distal phalangeal base of the 1st toe.
That was a mouthful, what does it mean?
The flexor hallucis (so we know it’s the big toe) attaches from the back of the fibula, on the end that’s farther away from us, and also to the membrane in between the fibula and tibia, ALL that attaches to the farthest base of the big toe
What is the blood supply to flexor hallucis longus?
Posterior tibial and peroneal artery.
What muscles does the peroneal artery supply?
Lateral crural: peroneous longus and brevis
Post: flexor hallucis longus, soleus, and tibialis posterior
So the peroneal supplies the lateral and posterior aspect of the leg?
Yes. But it does not supply the gastronemius, which is a more superficial muscle.
Near the ankle, the tibial nerve is positioned ________-_________ to the flexor hallucis longus muscle.
anterior-medial
The tibial nerve passes _________ to the tibia (medial malleolus).
posterior
Near the ankle, the posterior tibial artery is _________ -_________ to the flexor digitorum longus muscle.
posterior-lateral