Nerves
Common perineal nerve
AKA common fibular nerve; external popliteal nerve; lateral popliteal nerve.
Median nerve
After receiving inputs from both the lateral and medial cords of the brachial plexus, this nerve enters the arm from the axilla at the inferior margin of the teres major muscle. It then passes vertically down and courses with the brachial artery on the medial side of the arm between biceps brachii and brachialis. At first it is lateral to the artery and lies anterior to the elbow joint; it then crosses anteriorly to run medial to the artery in the distal arm and into the cubital fossa. Inside the cubital fossa, this nerve passes medial to the brachial artery, in front of the point of insertion of the brachialis muscle and deep to the biceps. This nerve then arises from the cubital fossa and passes between the two heads of pronator teres. It then travels between flexor digitorum superficialis and flexor digitorum profundus before emerging between flexor digitorum superficialis and flexor pollicis longus.
Sciatic nerve
Also called ischiadic nerve, ischiatic nerve
Common perineal nerve
Derived from the dorsal branches of the fourth and fifth lumbar and the first and second sacral nerves.
Ulnar nerve
Innervates: flexor carpi ulnaris flexor digitorum profundus lumbrical muscles opponens digiti minimi flexor digiti minimi abductor digiti minimi interossei adductor pollicis
Obturator nerve
L2-L4 of lumbar plexus
Femoral nerve
Nerve in thigh: supplies skin on the upper thigh and inner leg, and the muscles that extend the knee
Phrenic nerve
Nerve responsible for breathing, as it passes through motor info to the diaphragm & receives sensory info from it
Musculocutaneous nerve
Nerve roots C5-C6
Phrenic nerve
Nerve that originates in the neck & passes down between the lung & heart to reach the diaphragm.
Axillary nerve
Originates at brachial plexus C5 & C6
Radial nerve
Originates from brachial plexus C5-T1
Obturator nerve
Responsible for sensory innervation of the skin of the medial aspect of the thigh Also responsible for motor innervation of the adductor muscles of the lower extremity (external obturator, adductor longus, adductor braves, adductor magnus, gracilis, and pectineus
Axillary nerve
Supplies three muscles: deltoid, teres minor, long head of triceps
Femoral nerve
The muscles innervated by this nerve extend the knee
Median nerve
The only nerve that passes through the carpal tunnel.
Sciatic nerve
The sciatic nerve is formed from the L4 to S3 segments of the sacral plexus, a collection of nerve fibres that emerge from the sacral part of the spinal cord. The fibres unite to form a single nerve in front of the piriformis muscle. The nerve passes beneath piriformis and through the greater sciatic foramen, exiting the pelvis. From here, it travels down the posterior thigh to the popliteal fossa. The nerve travels in the posterior compartment of the thigh behind the adductor magnus muscle, and is itself in front of the one head of the biceps femoris muscle. At some point between the pelvis and popliteal fossa, the nerve divides into its two branches: (1)The tibial nerve, which travels down the posterior compartment of the leg into the foot (2)The common peroneal nerve (also called the common fibular nerve), which travels down the anterior and lateral compartments of the leg into the foot
Radial nerve
This nerve and its branches provide motor innervation to the dorsal arm muscles (the triceps brachii and the anconeus) and the extrinsic extensors of the wrists and hands; it also provides cutaneous sensory innervation to most of the back of the hand.
Musculocutaneous nerve
This nerve arises from the lateral cord of the brachial plexus & penetrates the coracobrachialis muscle & passes obliquely between the biceps and brachial, to the lateral side of the arm & is continued into the forearm as the lateral cutaneous nerve of the forearm.
Sciatic nerve
This nerve begins in the lower back and runs through the buttock and down the lower limb. It is the longest and widest single nerve in the human body, going from the top of the leg to the foot on the posterior aspect
Common perineal nerve
This nerve descends obliquely along the lateral side of the popliteal fossa to the head of the fibula, close to the medial margin of the biceps femoris muscle. Where the common peroneal nerve winds round the head of the fibula, it is palpable.
Femoral nerve
This nerve descends through the fibers of the posts major and passes down between it & the iliac muscle and then runs into the thigh and splits into an anterior and posterior division
Median nerve
This nerve innervates all of the flexors in the forearm except flexor carpi ulnas & part of the flexor digitorum profundus (those are ulnar nerve) Muscles of hand supplied by this nerve is remembered by LOAF: Lumbericals 1 & 2, Opponens policies, Abductor policies braves & flexor policies braves
Musculocutaneous nerve
This nerve innervates the muscles in the anterior compartment of the arm - biceps, brachialis & coracobrachialis --> These muscles flex the upper arm at the shoulder and the elbow...Also, the bicep performs supination of the forearm
Common perineal nerve
This nerve innervates the short head of the biceps femurs muscle. It provides sensory innervation to the skin over the upper third of the lateral aspect of the leg via the lateral cutaneous nerve of the calf. It gives the peroneal communicating nerve which joins the sural nerve in the midcalf.
Sciatic nerve
This nerve is derived from spinal nerves L4 to S3. It contains fibres from both the anterior and posterior divisions of the lumbosacral plexus.
Femoral nerve
This nerve is the largest branch of the lumbar plexus Arises from the dorsal divisions of the ventral rami of L2-L4
Axillary nerve
This nerve lies at first behind the axillary artery, and in front of the subscapularis, and passes downward to the lower border of that muscle. It then winds backward, in company with the posterior humeral circumflex artery, through a quadrilateral space bounded above by the subscapularis, below by the teres major, medially by the long head of the triceps brachii, and laterally by the surgical neck of the humerus, and divides into an anterior, a posterior, and a collateral branch to the long head of the triceps brachii branch.
Common perineal nerve
This nerve lies between the tendon of the biceps femoris and lateral head of the gastrocnemius muscle, winds around the neck of the fibula, between the peroneus longus and the bone, and divides beneath the muscle into the superficial peroneal nerve and deep peroneal nerve.
Phrenic nerve
This nerve originates from C3-C4
Ulnar nerve
This nerve originates from C8-T1 nerve roots & forms medial cord of brachial plexus & descends on the posteromedial aspect of the humerus.
Median nerve
This nerve originates from the brachial plexus, C5-C7 (lateral cord), C8 & T1 (medial cord)
Sciatic nerve
This nerve provides the connection to the nervous system for nearly the whole of the skin of the leg, the muscles of the back of the thigh, and those of the leg and foot.
Phrenic nerve
This nerve receives innervation from parts of both the cervical plexus & the brachial plexus
