BI 232 Peripheral Nerves and Plexuses PDF

  **[Name]** the plexuses and the **[spinal nerve roots]** that make up each plexus. **Plexus Name** **Spinal Nerve Roots** ----------------- ------------------------------------------------ Cervical Plexus C~1~-C~5~ Brachial Plexus C~5~-T~1~ (also need to know trunks and cords) Lum...

  **[Name]** the plexuses and the **[spinal nerve roots]** that make up each plexus. **Plexus Name** **Spinal Nerve Roots** ----------------- ------------------------------------------------ Cervical Plexus C~1~-C~5~ Brachial Plexus C~5~-T~1~ (also need to know trunks and cords) Lumbar Plexus T~12~-L~4~ Sacral Plexus L~4~-S~4~ Know the **[name]**, **[location]**, and **[distribution]** of the following nerves. +-----------------------------------+-----------------------------------+ | **Name** | **Distribution** | +===================================+===================================+ | Lesser occipital nerve | Skin of the neck and the scalp | | | posterior and superior to the ear | +-----------------------------------+-----------------------------------+ | Phrenic nerve | Diaphragm | +-----------------------------------+-----------------------------------+ | Supraclavicular nerves | Skin of the neck and shoulder | +-----------------------------------+-----------------------------------+ | Greater auricular nerve | Skin over the posterior aspect of | | | the ear and neck | +-----------------------------------+-----------------------------------+ | Axillary nerve | Deltoid and teres minor | +-----------------------------------+-----------------------------------+ | Median nerve | Flexor muscles on the forearm; | | | pronator quadratus and pronator | | | teres; digital flexors; sensory | | | from skin over the anterolateral | | | surface of hand | +-----------------------------------+-----------------------------------+ | Musculocutaneous nerve | Flexor muscles on the arm; | | | sensory from skin over the | | | lateral surface of the forearm | | | through the lateral antebrachial | | | cutaneous nerve. | +-----------------------------------+-----------------------------------+ | Ulnar nerve | Flexor carpi ulnaris, flexor | | | digitorum profundus, adductor | | | pollicis, and small digital | | | muscles by the deep branch; | | | sensory from skin over medial | | | surface of the hand through the | | | superficial branch. | +-----------------------------------+-----------------------------------+ | Radial nerve | Extensor muscles of arm and | | | forearm (triceps brachii, | | | anconeus, extensor carpi | | | radialis, extensor carpi ulnaris, | | | brachioradialis); sensory from | | | skin over posterolateral surface | | | of limb and radial half of hand. | +-----------------------------------+-----------------------------------+ | Pectoral nerves (medial and | Pectoralis muscles | | lateral) | | +-----------------------------------+-----------------------------------+ | Thoracic nerves | T~1~-T~12~, not part of a plexus, | | | trunk skin and muscles | +-----------------------------------+-----------------------------------+ | Iliohypogastric nerve | External and internal oblique and | | | transverse abdominis; skin over | | | the inferior abdomen and buttocks | +-----------------------------------+-----------------------------------+ | Genitofemoral nerve | Skin over anteromedial thigh and | | | portions of external genitalia | +-----------------------------------+-----------------------------------+ | Lateral femoral cutaneous | Skin over anterior, lateral, and | | | posterior thigh | +-----------------------------------+-----------------------------------+ | Femoral nerve | Quadriceps femoris, Sartorius, | | | pectineous, and iliopsoas; skin | | | of the anteromedial thigh, and | | | medial surface of the leg and | | | foot. | +-----------------------------------+-----------------------------------+ | Saphenous nerve | Skin of medial leg and foot; hip | | | and knee joints | +-----------------------------------+-----------------------------------+ | Gluteal nerves: | Superior: gluteus minimus, | | | gluteus medius, and tensor | | | fasciae latae | | | | | | Inferior: gluteus maximus | +-----------------------------------+-----------------------------------+ | Sciatic nerve | Semimembranosus, semitendinosus, | | | and adductor magnus; branches | | | into tibial and fibular nerves | +-----------------------------------+-----------------------------------+ | Tibial nerve | Skin of posterior surface of leg | | | and sole of foot; motor branches | | | to muscle of the back of thigh, | | | leg and foot. | +-----------------------------------+-----------------------------------+ | Fibular (common fibular) nerve | Skin of anterior and lateral | | | surface of leg and dorsum of | | | foot; motor branches to short | | | head of biceps femoris, fibularis | | | muscles, tibialis anterior, and | | | extensor muscles of toes. | +-----------------------------------+-----------------------------------+ \*Knowing the **Location** means you can identify the nerve on a picture\*