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Lower Extremity Anatomy > Posterior Thigh > Flashcards

Posterior Thigh Flashcards

(53 cards)

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1
Q

Posterior compartment muscles

A
  • Biceps femoris (short/long heads)
  • Semitendinosus
  • Semimembranosus
  • Hamstring muscles
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2
Q

Deeper muscles of posterior compartment

A
  • Short head of biceps femoris

- Semimembranosus

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3
Q

All posterior compartment muscles originate from

A
  • Ischial tuberosity

- EXCEPT short head of biceps femoris

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4
Q

All posterior compartment muscles are

A
  • 2 joint muscles

- EXCEPT short head of biceps femoris

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5
Q

All posterior compartment muscles innervated by

A
  • Tibial part of sciatic nerve

- ECXEPT short head of biceps femoris

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6
Q

All posterior compartment muscles supplied by

A
  • Perforating arteries of profunda femoris
  • Superior genicular branches of popliteal
  • Inferior gluteal
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7
Q

Short head of biceps femoris blood supply

A
  • Perforating arteries

- Lateral superior genicular artery (branch of popliteal)

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8
Q

Biceps femoris

A
  • 2 heads

- Long and short

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9
Q

Biceps femoris LONG head origin

A
  • Inferomedial aspect of posterior ischial tuberosity (along with semitendinosus)
  • Sacrotuberous ligament
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10
Q

Biceps femoris SHORT head origin

A
  • Inferior 2/3 of lateral lip of linea aspera

- Supracondylar line

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11
Q

Biceps femoris insertion (BOTH heads blend and have same insertion)

A
  • Lateral aspect of fibular head
  • Fibular collateral ligament
  • Lateral tibial condyle
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12
Q

Biceps femoris LONG head innervation

A
  • Tibial part of sciatic nerve
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13
Q

Biceps femoris SHORT head innervation

A
  • Common fibular part of sciatic nerve
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14
Q

Biceps femoris function

A
  • Extend thigh
  • Flex knee (leg)
  • Laterally rotate the knee
  • (Short head only flexes and laterally rotates the knee)
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15
Q

Biceps femoris tendon is palpable at

A
  • Posterolateral knee
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16
Q

Semitendinosus

A
  • Long, slender distal tendon
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17
Q

Semitendinosus origin

A
  • Inferomedial aspect of posterior ischial tuberosity (common with long head of biceps femoris)
  • Sacrotuberous ligament
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18
Q

Semitendinosus insertion

A
  • Proximal medial tibia

- Part of pes anserinus

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19
Q

Semitendinosus is palpable at

A
  • Posteromedial knee when contracted
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20
Q

Semitendinosus function

A
  • Extend thigh

- Flex/medially rotate the leg

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21
Q

Semimembranosus

A
  • Proxmial membranous tendon
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22
Q

Semimembranosus origin

Study These Flashcards
A
  • Superolatral aspect of posterior ischial tuberosity
23
Q

Semimembranosus insertion

Study These Flashcards
A
  • Groove on posterior aspect of medial tibial condyle
  • Oblique popliteal ligament
  • Fascia over popliteus muscle
24
Q

Oblique popliteal ligament (one of the semimembranosus insertions)

Study These Flashcards
A
  • Attaches to lateral femoral condyle
25
Semimembranosus function
- Extend thigh | - Flex/medially rotate leg
26
Pes anserinus (“gooses foot”)
- Shape of the insertion of the 3 tendons - Proximal, medial tibia - One muscle from each thigh compartment
27
Sartorius contribution to pes anserinus
- Most anterior | - Extends more superior
28
Gracilis contribution to pes anserinus
- Posterior - More superior than semitendinosus - Slightly more anterior than semitendinosus
29
Semitendinosus contribution to pes anserinus
- Posteroinferior
30
Nerves of the posterior thigh
- Posterior cutaneous nerve of the thigh (S1-3) | - Sciatic nerve (L4-S3)
31
Posterior cutaneous nerve of thigh level
- S1-3
32
Posterior cutaneous nerve of thigh (S1-3) pathway
- Usually medial to sciatic nerve | - Travels deep to fascia lata
33
Posterior cutaneous nerve of thigh (S1-3) branches supply
- Posterior thigh - Skin over popliteal fossa - Superior calf - Perineum - Gluteal region
34
Gluteal region is also supplied by
- Inferior cluneal nerves | - Pass around inferior edge of glut max
35
Sciatic nerve level
- L4-S3
36
Sciatic nerve (L4-S3)
- Largest nerve (~ 2cm wide)
37
Sciatic nerve (L4-S3) passes midway between
- PSIS and ischial tuberosity | - Greater trochanter and ischial tuberosity
38
Sciatic nerve (L4-S3) travels deep to
- Long head of biceps femoris
39
Sciatic nerve (L4-S3) usually separates in
- Distal thigh/popliteal fossa
40
Sciatic nerve (L4-S3) separates into
- Tibial nerve (L4-S3) | - Common fibular (L4-S2)
41
Tibial nerve (L4-S3) travels to
- Posterior leg
42
Common fibular nerve (L4-S2) pathway
- Passes below biceps femoris tendon | - Around head of fibula (palpable)
43
Sciatic nerve (L4-S3) innervates
- Posterior thigh, leg, and foot muscles | - Cutaneous innervation of most leg/foot
44
Sciatic nerve (L4-S3) varies in relationship to
- Piriformis muscle
45
Arteries of the posterior thigh
- Inferior gluteal - Perforating arteries - Popliteal artery
46
Inferior gluteal artery is located
- Inferior to piriformis
47
Inferior gluteal artery can give off artery to
- Sciatic nerve | - Supplies sciatic nerve
48
Inferior gluteal artery branches supply
- Gluteus maximus - Deep gluteal muscles - Proximal hamstring muscles
49
Proximal hamstring muscles receiving blood supply from inferior gluteal artery
- Long head of biceps femoris - Semitendinosus - Semimembranosis
50
Perforating arteries branch from
- Deep artery of thigh (deep femoral/profunda femoris)
51
Perforating arteries pierce
- Adductor magnus
52
Perforating arteries supply
- Posterior thigh compartment | - Inferior gluteus maximus
53
Popliteal artery supplies
- Distal aspect of posterior thigh muscles | - Knee joint

Lower Extremity Anatomy (35 decks)

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