OBTURATOR NERVE
| A | Abductor muscle | |
| B |
Adductor compartment |
|
| C |
Extensor compartment |
|
| D |
Flexor compartment |
Which muscles are supplied by obturator nerve
| A |
Abductor muscle |
|
| B |
Adductor compartment |
|
| C |
Extensor compartment |
|
| D |
Flexor compartment |
B. i.e. Adductor compartment
Adductor compartment of thigh is supplied by obturator nerve; and anterior flexor compartment of thigh by femoral nerve. Gluteus medius, minimus & tensor fascia lata are supplied by superior gluteal nerve, (Mn- “Middle & Minimum class Tension is superior”). Where as gluteus maximus is supplied by inferior gluteal nerve.
Nerve supply of adductor magnus is through:
| A |
Tibial part of sciatic nerve |
|
| B |
Obturator nerve |
|
| C |
Both |
|
| D |
None |
Innervation of adductor magnus
- Posterior division of obturator nerve innervates most of the adductor magnus
- Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)
| A |
Tibial part of sciatic nerve |
|
| B |
Obturator nerve |
|
| C |
Both |
|
| D |
None |
Innervation of adductor magnus
- Posterior division of obturator nerve innervates most of the adductor magnus
- Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)
| A |
Superior gluteal nerve |
|
| B |
Inferior gluteal nerve |
|
| C |
Sciatic nerve |
|
| D |
Obturator nerve |
Ans. is ‘d’ i.e., Obturator nerve
Structures crossing the dorsal surface of the given structure marked by a “red arrow” are?
| A |
Internal pudendal vessel. |
|
| B |
Pudendal nerve. |
|
| C |
Obturator nerve. |
|
| D |
Nerve to obturator internus. |
Ans;C).Obturator nerve
The structure marked by a red arrow represents the ischial spine.
ISCHIAL SPINE-
A thin pointed triangular eminence that projects from the dorsal border of the ischium and gives attachment to the gemellus superior on its external surface and to the coccygeus, levator ani, and pelvic fascia on its internal surface
The structure crossing the dorsal surface of the ischial spine is the Obturator nerve.
Psoas major, iliacus & pectineus muscles, femoral vessels and nerve, the femoral branch of the genitofemoral nerve, lateral cutaneous nerve of thigh and lymphatics pass below the inguinal ligament.
‘PIN’ structures i.e. Pudendal nerve, Internal Pudendal vessels, Nerve to obturator internus come out of greater sciatic foramen, cross the dorsal surface of ischial spine & enter into the lesser sciatic foramen.
From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.
Clinical significance
It can serve as a landmark in pudendal anesthesia