Posterior Thigh - Poplitieal Fossa Flashcards

1
Q

Which muscle creates the characteristic calf shape?

A

Gastrocnemius

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2
Q

Which muscle lies beneath the gastrocnemius?

A

Soleus

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3
Q

What are the boundaries of the popliteal fossa?

A
  • Biceps Femoris (superilateral)
  • Semitendinosis and semimembranosis (Superomedial)
  • Gastrocnemius (Inferior)
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4
Q

What are the contents of the popliteal fossa?

A

Popliteal artery and vein

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5
Q

What is the Cutaneous innervates of the posterior aspect of the thigh?

A

Upper Part - Posterior cutaneous nerve of thigh

Lower latera half - Medial Sural Cutaneous And Sural nerve

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6
Q

What are the muscles of the posterior thigh?

A

A. Glutei
Maximus
MEdius
Minimus

B. Other small muscles
Piriformis
Obturator Internus
Superior gemellus
Inferior gemellus
Quadratus lamborum
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7
Q

What are the nerve contents of the posterior thigh?

A
  1. Sciatic N
  2. Superior Gluteal n
  3. Inferior gluteal n
  4. Post cutaneous n of thigh
  5. Nerve to Obturator internus
  6. Nerve to quadratus lamborum
  7. Pudendal n
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8
Q

What are the vessels contents of the posterior thigh?

A
  • Sup gluteal
  • Inf gluteal
  • Internal Pudendal
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9
Q

What structure pass through the greater sciatic foramen above the Piriformis?

A

Superior gluteal nerves and vessels

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10
Q

What structures pass through the greater sciatic foramen below the Piriformis?

A
  • Inf gluteal nerves/vessels
  • Sciatic nerve
  • Ps cutaneous n. Of thigh
  • n. To QF
  • n. To ObInt
  • Pudendal n.
  • Internal pudendal vessels
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11
Q

What structures make up the greater sciatic foramen?

A
  • Greater sciatic notch
  • Sacrotuberous ligament
  • Sacrospinous ligament
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12
Q

What structures make up the lesser sciatic notch?

A
  • Lesser sciatic notch
  • Sacrotuberous ligament
  • Sacrospinous ligament
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13
Q

What structures pass through the lesser sciatic foramen?

A
  • Tendon Of Obturator Internus
  • N. To ObtInt
  • Pudendal n.
  • Int Pudendal vessels
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14
Q

The is the primary origin of the gluteus Maximus?

A

Back of sacrum &
coccyx & back of
Sacrotuberous
ligament.

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15
Q

What are the attachments and actions of the Gluteus minimus?

A

Ant gluteal surface of ilium —> Ant surface of the greater trochanter

Abducts femur; Medially rotates thigh

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16
Q

What are the attachments And actions of the gluteus medius?

A

Middle part of the gluteal surface of Ilium —> Lat surface of greater trochanter

abducts the femur; medially
rotates the thigh

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17
Q

What are the attachments and actions of gluteus Maximus?

A

Pos gluteal surface of ilium + Back of sacrum &
coccyx & back of
Sacrotuberous
ligament. —> Iliotibial Tract + Gluteal tuberosity of femur

Extends thigh; laterally rotates femur

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18
Q

What are the lateral rotators of the thigh?

A
  • Sup/Inf gemellus
  • Obturator Int/Ext
  • Quadratus femoris
  • Piriformis
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19
Q

What are the muscles which make up the Hamstrings?

A
  • Bicepts Femoris
  • Semimembranous
  • Semitendinous
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20
Q

What is the innervation and blood supply of Glut Max?

A

Inf Glut n.

Supo/inf gluteal arteries

21
Q

What is the innervation and blood supply of Glut Med?

A

Sup Glut n.

Sup gluteal artery

22
Q

What is the innervation and blood supply of Glut Min?

A

Sup glut n.

Sup glut a.

23
Q

What are attachments and actions of superior gemellus?

A

Ischial spine —> Obturator internus tendon

Laterally rotates femur

24
Q

What are attachments and actions of inferior gemellus?

A

Ischial Tuberosity —> Obturator Internus Tendon

Laterally rotates femur

25
Q

What are attachments and actions of Obturator Externus?

A

the external surface of the obturator membrane and the superior and inferior pubic rami —> Trochanteric fossa of femur

Laterally rotates thigh

26
Q

What are attachments and actions of Obturator internus?

A

the internal surface of the obturator membrane and margin of the obturator foramen —> Medial surface of greater trochanter above trochanteric fossa

Laterally rotates and abducts

27
Q

What are attachments and actions of Quadriceps femoris?

A

anterior surface Femoris
of the femur and the anterior side of the medial and lateral intermuscular septa —> Tibial Tuberosity via patellar ligament

Extends knee; Flexes thigh

28
Q

What are attachments and actions of Piriformis?

A

Ant surface of sacrum —> Upper border of greater trochanter of femur

29
Q

What is innervation and blood supply of the superior gamellus?

A

N. To Obt Int

Inf gluteal a.

30
Q

What is innervation and blood supply to inferior gamellus?

A

N. To Quad femoris

Inf glut a.

31
Q

What is the innervation and blood supply of Obturator externus?

A

Obturator n.

Obturator a.

32
Q

What is the innervation and blood supply to Obturator internus?

A

N. To obt internus

Obturator a.

33
Q

What is innervation and blood supply of quadriceps femoris?

A

Femoral n.

Lat Circumflex femoral a.; Deep femoral a.

34
Q

What is innervation and blood supply of Piriformis?

A

N. To Piriformis (Ventral Ram S1-S2)

Inf gluteal a.; Lat sacral and superior glut aa.

35
Q

What are attachments and actions of Biceps femoris?

A

long head: Femoris
ischial tuberosity; short head: lateral lip of the linea aspera —> Head Of Fibula + Lateral condyle Of Tibia

Extends thigh; flexes leg

36
Q

What are attachments and actions of semimembranous?

A

Upper outer surface of ischial tuberosity —> Medial condyle of the tibia

Extends thigh; flexes leg

37
Q

What are attachments and actions of Semitendinous?

A

Lower medial surface ischial tuberosity —> MEdial surface of Tibia (Via pes anserinus)

Extends the thigh; flexes leg

38
Q

What is innervation and blood supply of Biceps femoris?

A

(Long) Tibial n. + (Short) Common Fibular

Perforating branches deep femoral a.

39
Q

What is innervation and blood supply semimembranous?

A

Tibial n.

Perforating branches deep fem a.

40
Q

What is the innervation and blood supply of Semitendinous?

A

Tibial n.

Deep femoral a.

41
Q

What muscles insert via the pes anserinus?

A
  • Gracilis
  • Sartorius
  • Semitendinosus
42
Q

What are the hamstring muscles?

A
  • Biceps femoris
  • Semimembranous
  • Semitendinosus
  • ISchial part of adductor magnums
43
Q

What is the course and branches off of the superior gluteal nerve?

A
  • Passes through GSF above Piriformis and then between the gluteus medius.
  • Muscular branches to gluteus medius, minimus, and TFL
  • Articular to hip joint
44
Q

What is the course and branches off of the Inferior gluteal nerve?

A
  • Passes through GSF below piriformis and then deep to gluteus Maximus
  • muscular branches to gluteus Maximus
45
Q

What is the course and branches off of the N. To Quad Fem?

A
  • Passes through GSF below Piriformis
  • Muscular branches to QF and IGem
  • Articular to hip joint
46
Q

What is the course and branches off of the Pos Cut n. To thigh?

A
  • Passes through GSF below piriformis and descends deep to deep fascia
  • Cutaneous branches to gluteal region, back of scrotum//lava majus, back of thigh, and upper part of back of leg
47
Q

What is the course and branches off of the Sciatic nerve?

A
  • Passes through GSF below piriformis; then to IS, SGem, Tendon go OI, IGem, QF, and AdMag
  • No branches in Gluteal region!
  • Tibial and common peroneal Nerves in middle of back of thigh
48
Q

What is Baker’s Cyst?

A

inflammation and swelling of the semimembranosus bursa – a fluid filled sac found in the knee joint.

49
Q

What nerve is most at risk from popliteal artery compression? What are symptoms?

A

The tibial nerve is particularly susceptible to compression from the popliteal artery. The major features of tibial nerve compression are:

•Weakened or absent plantar flexion

•Paraesthesia of the foot and
posterolateral leg

*An aneurysm of the popliteal artery can be detected by an obvious palpable pulsation in the popliteal fossa. An arterial bruit may be heard on auscultation.