Topic 15 - Medial muscles of the thigh and canalis femoralis

Question 1

M.sartorius

Answer 1

O: Crista iliaca, spina iliaca ventralis cranialis, fascia thoracolumbaria
I: Radiating into fascia lata and crural fascia. Pars cranialis: inserts above stifle joint. Pars caudalis: inserts below stifle joint.
A: Flexes hip and ext./flex stifle - depending on which part contracts more

Question 2

M.gracilis

Answer 2

O: Symphisis pelvis, by means of tendo symphisialis
I: Medially on tibial crest, fascia cruris and tuber calcanei by an accesory tendon to common calcaneal tendon
A: Adducts hindlimb, extends hip, flexes stifle, extends tarsus

Question 3

M.pectineus

Answer 3

O: Pecten ossis pubis, prepubic tendon
I: Labium mediale ossis femoris
A: Adduction of thigh

Question 4

M.adductor

Answer 4

O: -longus: from ramus cran. ossis pubis, -magnus et brevis from symphisis pelvis (tendo symphisialis), ramus cau. ossis pubis and ramus ossis ischii
I: Facies aspera and labium laterale of femur
A: Adducts hindlimb and extends hip

Question 5

What is canalis femoralis?

Answer 5

Channel where femoral vessels and nerves go towards hindlimb. It´s opening from abdominal cavity, underneath inguinal ligament is the femoral ring (anulus femoralis).

Question 6

What is the borders of canalis femoralis?

Answer 6

Formed by the femoral triangle:

• M.sartorius pars caudalis (rostral)
• M.pectineus (caudal)
• Lig.inguinale (proximal)
• Lig.iliopsoas (medial)
• Fascia femorale (lateral)

Question 7

The space under lig. inguinale, before canalis femoralis starts

Answer 7

Can be divided into:

• Lacuna vasorum (for femoral vessels)
• Lacuna musculorum (for m.iliopsoas)

Question 8

The muscles

Answer 8

M.sartorius pars cran. and cau.
M.gracilis
M.pectineus
M.adductor (lateral and magnus et brevis)
All except sartorius adducts the thigh.