Nerve supply of muscles/motor supply Flashcards
Where does the tibial nerve arise?
Sciatic nerve.
Where does the tibial nerve exit through?
Popliteal fossa.
What are the branches of the tibial nerve?
- Sural nerve.
- Calcaneal nerve.
- Medial + lateral plantar nerves.
What muscles does the tibial nerve supply?
- Plantaris.
- Gastrocnemius.
- Popliteus.
- Soleus.
- Tibialis Posterior.
- Flexor Digitorum Longus.
- Flexor Hallucis Longus.
What muscles does the medial plantar branch of the tibial nerve supply?
- Flexor digitorium brevis.
- Abductor hallucis.
- Flexor hallucis brevis.
- Lumbrical 1.
What muscles does the lateral plantar branch of the tibial nerve supply?
- Abductor Digiti Minimi.
- Flexor Digiti Minimi.
- Quadratus Plantae.
- Adductor Hallucis.
- Plantar Interossei.
- Dorsal Interossei.
- Lumbrical 2,3,4.
Where does the common fibular nerve arise?
Sciatic nerve.
Where does the common fibular nerve exit through?
Popliteal fossa.
What are the branches of the common fibula nerve?
- Sural nerve.
- Lateral sural nerve.
What muscle does the common fibular nerve supply?
Short head of bicep femoris.
Where does the sciatic nerve arise from?
Sacral plexus.
Where does the sciatic nerve exit through?
- Greater sciatic foramen.
- Under piriformis.
What muscles does the tibial branch of the sciatic nerve supply?
- Semimembranosus.
- Semitendinosus.
- Long head of bicep femoris.
What muscle does the common fibular branch of the sciatic nerve supply?
Short head of bicep femoris.
Describe the pathway of the sciatic nerve.
- Travels between lateral rotators + gluteus Maximus.
- Halfway between the ischial tuberosity + greater trochanter.
- Continues between the hamstrings + adductor magnus.
What is the sciatic nerve comprised of?
- Tibial nerve.
- Common fibular nerve.
Where do the tibial and common fibular nerves separate from the sciatic nerve?
At the popliteal fossa.
Where does the deep fibular nerve arise from?
The common fibular nerve.
What does the deep fibular nerve exit through?
Deep to fibularis longus.
What muscles does the deep fibular nerve supply?
- Tibialis Anterior.
- Extensor Hallucis Longus.
- Extensor Digitorum Longus.
- Extensor Hallucis Brevis.
- Extensor Digitorum Brevis.
- Fibularis Tertius.
Describe the pathway of the deep fibular nerve.
- Passes down in front of the interosseous membrane of the leg.
- Deep to anterior muscles.
Where does the superficial fibular nerve arise from?
The common fibular nerve.
Where does the superficial fibular nerve exit through?
Deep near the neck of the fibula.
What muscles does the superficial fibular nerve supply?
- Fibularis longus.
- Fibularis brevis.
Describe the pathway of the superficial fibular nerve.
- Travels a short distance down from the neck of the fibula.
- And sends branches to the top of the foot.
Where does the femoral nerve arise from?
Lumbar plexus.
What does the femoral nerve exit through?
Femoral triangle.
What muscles does the femoral nerve supply?
- Iliacus.
- Pectineus.
- Sartorius.
- Rectus Femoris.
- Vastus Lateralis.
- Vastus Intermedius.
- Vastus Medialis.
- Articularis Genu.
What are the branches of the femoral nerve?
- Sensory saphenous nerve.
- Cutaneous branches.
Describe the pathway of the femoral nerve.
- Under the inguinal ligament.
- Through the femoral triangle.
- Continues through the adductor canal.
Where does the obturator nerve arise from?
Lumbar plexus.
Where does the obturator nerve exit through?
Obturator foramen.
What muscles does the obturator nerve supply?
- Pectineus.
- Gracilis.
- Adductor Longus.
- Adductor Brevis.
- Adductor Magnus.
- Obturator Externus.
What are the branches of the obturator nerve?
- Branches to adductors.
- Sensory branches.
Describe the pathway of the obturator nerve.
- Through the psoas major.
- Enters the obturator canal.
- Exits the pelvis with obturator vessels.
Where does the superior gluteal nerve arise from?
Sacral plexus.
Where does the superior gluteal nerve exit through?
- Greater sciatic foramen.
- Above the piriformis.
What muscles does the superior gluteal nerve supply?
- Gluteus medius.
- Gluteus minimuis.
- Tensor Fascia latae.
Where does the inferior gluteal nerve arise from?
Sacral plexus.
What does the inferior gluteal nerve exit through?
- Greater sciatic foramen.
- Below piriformis.
What muscles does the inferior gluteal nerve supply?
Gluteus maximus.
Where does the pudendal nerve arise from?
Sacral plexus.
What does the pudendal nerve exit through?
The lower part of the greater sciatic foramen.
What muscles does the pudendal nerve supply?
Genital + perineal region.
What are the branches of the pudendal nerve?
- Inferior rectal nerve.
- Perineal nerve.
What muscle does the inferior rectal branch of the pudendal nerve supply?
External anal sphincter.
What muscles do the perineal branch of the pudendal nerve supply?
Levator ani muscles.
Describe the pathway of the pudendal nerve.
- Exits the lower part of the greater sciatic foramen.
- Between the piriformis + coccygeus.
- Runs around behind the ischial tuberosity + sacrospinous ligament.
- Re-enters the lesser sciatic foramen.
- Passes through the pudendal canal.
