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Exam 3- Anatomy > Posterior Thigh Muscles > Flashcards

Posterior Thigh Muscles Flashcards

1
Q

Muscles that make up the posterior thigh

A

semitendinosus
semimebranosus
biceps femoris

all compose the hamstring

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2
Q

semitendinosus

function
innervation
A

begins 2/3 of way down thigh

extends thigh, medially rotates and flexes leg
tibial division of sciatic nerve

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3
Q

General function of all the hamstring muscles

A 
thigh extensions (except short head of biceps femoris)
flexes above the knee

leg extension

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4
Q

general innervation of all hamstring muscles

A

tibial decision of sciatic (except biceps femoris)

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5
Q

semitendinosus attachements

A

ischial tuberosity and medial surface of superior aspect of tibia

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6
Q

semimembranosus

function innervation

A

extends thigh, flexes leg

tibial division of sciatic nerve

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7
Q

hamstring attachments (common origin)

A

ischial tuberosity

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8
Q

two parts of semimembranosus

A

based on insertion on the distal tendon

divides into parts that go to the medial tibial condyle and part that blends with popliteal fascia to become the oblique popliteal ligament

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9
Q

oblique popliteal ligament

A

reinforces the intercondyler part of joint capsule of knee

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10
Q

biceps femoris long head

function and innervation

A

flexes leg, extends thigh

tibial division of sciatic nerve

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11
Q

biceps femoris is different from rest of hamstrings because

A

has two parts with two different innervations

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12
Q

biceps femoris short head

function and innervation

A

flexes leg

common fibular branch of sciatic nerve

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13
Q

adductor magnus (hamstring portion) function and innervation

A

extends thigh, tibial division of sciatic nerve

medial and superior to most other hamstring and thigh muscles

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14
Q

diamond shaped region posterior to knee

A

popliteal fossa

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15
Q

list 4 boundaries of political fossa

A
  1. superomedially
  2. superolaterally
  3. inferolaterally
  4. inferomedially
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16
Q

contents of political fossa

A

nerves
popliteal vein, lymph nodes and branches
popliteal artery and branches

17
Q

superomedial boundary of popliteal fossa

A

semitendinosus and semimebranosus

18
Q

superolateral boundary of popliteal fossa

A

biceps femoris

19
Q

inferolateral boundary of popliteal fossa

A

lateral head of gastrocnemius

20
Q

inferomedial boundary of popliteal fossa

A

medial head of gastrocnemius

21
Q

where does popliteal artery arise?

A

from femoral artery after passage through adductor hiatus

22
Q

attachments of biceps femoris

A 
long head (ischial tuberosity)
short head (distal lateral lip of linea aspera)

common insertion on head of fibula

23
Q

attachment of adductor magnus (hamstring portion)

A

origin: ischial tuberosity
insertion: medial epicondyle of femur

24
Q

deepest structure of popliteal fossa

A

popliteal artery

25
Q

anastomoses of popliteal artery is via

A

genicular branches that run close to knee joint capsule

26
Q

Arteries that compose the genicular anastomosis

A

superior lateral genicular artery
inferior lateral genicular artery
superior medial genicular artery
inferior medial genicular artery

27
Q

what joins the genicular branches

A

descending branch of lateral femoral circumflex artery

joins it when coming from top of hip

provides alternative blood route to leg should femoral artery become occluded

28
Q

what do the genicular branches supply

A

capsule and ligaments of knee joints

29
Q

why would blood bypass popliteal artery?

A

knee is fully flexed too long

narrowed or occluded popliteal vessels

30
Q

termination of popliteal artery

A

divides into anterior and posterior tibial arteries

31
Q

what is the popliteal vein formed by

A

union of anterior and posterior tibial veins near inferior border of popliteus muscle

32
Q

where is the termination of small saphenous vein

A

politeal vein

33
Q

relationship of the location of popliteal vein and political artery

A

the popliteal vein lies superficial to and in same fibrous sheath as artery

34
Q

where does the popliteal vein become femoral vein?

A

after traversing adductor hiatus

35
Q

nerves that compose the popliteal fossa

A

tibial and common fibular nerve

the popliteal fossa is where the sciatic nerve ends

36
Q

tibial nerve

A

most superficial

superficial to deep posterior leg muscles
knee joint

37
Q

common fibular nerve (peroneal nerve)

A

leaves popliteal fossa by passing superficial to lateral head of gastrocnemius

winds around head and neck of fibula (injury)

38
Q

what does the common fibular (peroneal) nerve terminate into?

A

deep fibular

superficial fibular nerve

39
Q

sural nerve

A

innervates the skin of the region

runs with saphenous

Exam 3- Anatomy (13 decks)

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