Lower Extremity Anatomy > Medial Thigh > Flashcards

Medial Thigh Flashcards

(51 cards)

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1
Q

Medial thigh muscles (names)

A
  • Pectineus
  • Adductor longus
  • Adductor brevis
  • Adductor magnus
  • Gracilis
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2
Q

Medial thigh muscle commonalities

A
  • Most attach proximally to pubic bone and ischiopubic ramus
  • Most innervated by obturator nerve
  • Distal attachment is on the femur
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3
Q

Medial thigh muscles functions

A
  • Hip adduction

- Hip flexion

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4
Q

Pectineus

A
  • Anterior to obturator externus

- Can be grouped with anterior compartment muscles

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5
Q

Pectineus origin

A
  • Pectineal line of pubic bone (pectin pubis)
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6
Q

Pectineus insertion

A
  • Pectineal line of femur
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7
Q

Pectineus innervation

A
  • Femoral nerve or accessory obturator or both
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8
Q

Pectineus bloody supply

A
  • Obturator artery

- Medial femoral circumflex artery

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9
Q

Pectineus function

A
  • Flexion/adduction/medial rotation of thigh
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10
Q

Adductor longus origin

A
  • Pubic body (below pubic crest)
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11
Q

Adductor longus insertion

A
  • Middle 1/3 of medial lip of linea aspera
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12
Q

Adductor longus innervation

A
  • Obturator nerve (anterior branch)
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13
Q

Adductor longus blood supply

A
  • Obturator artery
  • Profunda femoris
  • Medial femoral circumflex artery
  • Femoral artery
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14
Q

Adductor longus function

A
  • Adduct/flex thigh (especially when extended)
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15
Q

Most commonly strained adductor muscle, “pulled groin”

A
  • Adductor longus
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16
Q

Adductor brevis is a landmark for

A
  • Anterior/posterior branches of obturator nerve
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17
Q

Adductor brevis origin

A
  • Inferior pubic ramus

- Pubic body

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18
Q

Adductor brevis insertion

A
  • Pectineal line of femur

- Superior aspect of medial lip of linea aspera

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19
Q

Adductor brevis innervation

A
  • Obturator nerve (anterior branch)
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20
Q

Adductor brevis blood supply

A
  • Obturator artery

- Medial femoral circumflex artery

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21
Q

Adductor brevis function

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A
  • Adduct/flex the thigh (especially when extended)
22
Q

Adductor magnus fiber orientation

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A
  • Superior muscle fibers are oriented transversely (adductor minimis)
  • The middle fibers are oriented at an oblique angle
  • The inferior fibers are oriented vertically (hamstring part)
  • Hamstring part is palpable at medial knee
23
Q

Adductor magnus origin

Study These Flashcards
A
  • Inferior part of inferior pubic ramus
  • Ischial ramus
  • Ischial tuberosity
24
Q

Adductor magnus insertion

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A
  • Gluteal tuberosity
  • Linea aspera
  • Medial supracondylar line
  • Adductor tubercle
25
Adductor magnus innervation
- Posterior branch of obturator nerve (adductor part) | - Tibial part of sciatic nerve (hamstring part)
26
Adductor magnus blood supply
- Femoral a. - Medial femoral circumflex a. - Perforating arteries (profunda femoris) - Obturator a. - Popliteal a.
27
Adductor magnus function
- Adduct thigh - Extend the thigh (hamstring part) - Can also flex thigh
28
Adductor hiatus
- Opening between the hamstring portion and the femur | - Femoral vessles > popliteal vessels
29
Gracilis muscle
- Most medial and superficial | - 2 joint muscle
30
Gracilis origin
- Inferior pubic body - Inferior pubic ramus - Pubic symphysis (sometimes)
31
Gracilis insertion
- Proximal aspect of medial tibia | - Part of pes anserinus
32
Gracilis innervation
- Obturator nerve (anterior branch)
33
Gracilis blood supply
- Obturator artery - Medial femoral circumflex artery - Profunda femoris
34
Gracilis function
- Thigh adduction | - Flex and medial rotate leg
35
Obturator artery
- Branch of the internal iliac | - Exits pelvis through obturator canal
36
Obturator artery supplies
- Medial compartment
37
Obturator artery anastomoses with
- Medial femoral circumflex artery | - Inferior gluteal arteries
38
Obturator artery branches
- Anterior branch | - Posterior branch
39
Anterior branch of obturator artery anastomoses with
- Posterior branch
40
Posterior branch of obturator artery supplies
- Procimal aspect of hamstrings | - Acetabular artery
41
Acetabular artery pathway
- Passes through acetabular notch - Deep to transverse acetabular ligament - Can also arise from MFC
42
Acetabular artery gives off
- Artery of ligamentum teres femoris | - Major supplier of femoral head in the young child (less than 3)
43
Obturator nerve (L2-4)
- Enters thigh by passing through the obturator canal | - 2 branches
44
Branches of obturator nerve
- Anterior branch (anterior to adductor brevis) | - Posterior branch (posterior to adductor brevis)
45
Anterior branch (anterior to adductor brevis) innervates
- Skin over medial thigh - Hip joint - Adductor longus - Gracilis - Adductor brevis - Contributes to subsartorial plexus
46
Posterior branch (posterior to adductor brevis) innervates
- Can supply adductor brevis, less common - Obturator externus - Adductor magnus (adductor part) - Knee joint
47
Patellar plexus innervation
- Cutaneous innervation around patella
48
Subsartorial plexus innervation
- Located deep to sartorius - Around distal part of adductor longus - Cutaneous innervation medial thigh
49
Obturator externus function
- Thigh adduction
50
Nerves of patellar plexus
- Intermediate femoral cutaneous - Medial femoral cutaneous - Lateral femoral cutaneous - Saphenous nerve (infrapatellar branch)
51
Nerves of the subsartorial plexus
- Anterior branch of obturator nerve - Medial femoral cutaneous nerve - Saphenous nerve
Lower Extremity Anatomy
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