Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
Where is the the sacral plexus located ? |
On the surface of the posterior pelvic wall, anterior to the piriformis muscle. |
|
|
What spinal nerves form the sacral plexus? |
S1-S4 (With contributions from L4 and L5) |
|
|
What are the two main destination of branches the sacral plexus? |
1. exit the pelvis via the greater sciatic foramen 2. remain in the pelvis |
|
|
What are the branches of the sacral plexus? |
Superior Gluteal nerve Inferior gluteal nerve Sciatic Nerve Posterior femoral cutaneous Pudendal nerve |
|
|
What is the root of the sup. gluteal nerve? |
L4, L5, S1 |
|
|
What is the motor function of the superior gluteal nerve? |
It supplies the gluteus minimus, gluteus medius, tensor of fascia latea |
|
|
What is the root of the inf. gluteal nerve? |
L5, S1, S2 |
|
|
What is the motor function of the inf.gluteal nerve? |
It supplies the gluteus maximus |
|
|
What is the root of the sciatic nerve? |
L4, L5, S1, S2, S3 |
|
|
What is the motor function of the tibial portion of the sciatic nerve? |
Innervates all of the muscles in the posterior compartment of the thigh, apart from the short head of the biceps femoris. All muscles in the posterior compartment of the leg. All muscles in the sole of the foot. |
|
|
What is the motor function of the common fibular portion of the sciatic nerve? |
Supplies the Short head of biceps femoris,
all muscles in the anterior and lateral compartments of the leg and extensor digitorum brevis. |
|
|
What is the sensory function of the tibial portion of the sciatic nerve? |
Innervates the skin on the posterolateral and medial surfaces of the foot as well as the sole of the foot.
|
|
|
What is the sensory function of the the common fibular portion of the sciatic nerve? |
Innervates the skin on the anterolateral surface of the leg and the dorsal aspect of the foot.
|
|
|
What is the root of the posterior femoral cutaneous? |
S1, S2, S3 |
|
|
What is the sensory function of the posterior femoral cutaneous nerve? |
Innervates the skin on the posterior surface of the thigh and leg. Also innervates the skin of the perineum.
|
|
|
What is the root of the pudendal nerve? |
S2, S3, S4 |
|
|
What is the motor function of the pudendal nerve? |
Innervates the skeletal muscles in the perineum, the external urethral sphincter, the external anal sphincter, levator ani.
|
|
|
What is the sensory function of the Pudendal nerve? |
Innervates the penis and the clitoris and most of the skin of the perineum
|
