Flashcards in Extra titbits Deck (27)
Where is the femoral nerve from
Formed with psoas major from L2-L4
What is the sensory distribution of the femoral nerve
Anterior cutaneous nerve of the thigh
Saphenous cutaneous nerve of the leg and foots (inf/med aspect)
Peroneus Longus and peroneus brevis O and I
O= sup 2/3 of lateral fibula
I= base of 1st MT and medial cuneiform
O= inferior 2/3 of lateral fibula
I= base of 5th MT
insertions of the leg extensor muscles
TA = base of 1st MT and Medial cuneiform
EDL = middle and distal phalanx of lateral 4 toes
EHL= base of distal phalanx of great toe
Two places to find a pulse in the foot, and what they are from
second metatarsal (dorsalis pedis/ anterior tibial artery)
posterior to medial malleolus (posterior tibial)
What does the anterior tibial artery travel behind to get to the foot?
goes under EHL (between EDL and EHL
What supplies the sural nerve, where does it run and what does it supply
from Tibial and common peroneal. Runs down the back of the leg superfically, cutaneously supplying the inf/medial leg and dorsum of the foot.
What causes foot drop?
Damage to the deep peroneal or common peroneal nerves. This causes weakness of the dorsiflexors, and a high steppage gait.
What is the locking mechanism of the knee for?
to reduced energy required to maintain a straight leg
What does patella tendon insert onto
Tell me about the joint capsule of the knee
Is a fibrous membrane that surrounds the articular cavity. MCL and medial meniscus are fused with this membrane, their lateral counterparts are not. Thickened anteriorly by the patella / quads tendons.
What is the vascular supply to the knee?
Femoral, lateral femoral circumflex, and popliteal arteries, anastomosing with branches off the anterior tibial and circumflex peroneal arteries
Where does the small saphenous vein drain into the popliteal vein
At the inferior border of the popliteal fossa (between gastroc heads)
Where is the pes anserinus found
medial surface of the proximal tibia
myotomes of internal rotation
myotomes of external rotation
O/I of biceps femoris
O= LH at ischial tuberosity
SH at linea aspera
I = head of fibula
Origin and actions of Semitendonosis and semimembranosis
O= ischial tuberosity
Action= flexes and int rotates leg, extends thigh
superior and inferior boundaries of the gluteal region
Sup= iliac crests
inf= gluteal fold (glut max muscles)
Greater sciatic foramen for?
structures entering/leaving gluteal region
Lesser sciatic foramen for?
Structurres entering/leaving the perineum
the short external rotators of the gluteal region are innervated from the
Primary role of gluteus maximus
When do hamstring injuries usually occur, what happens
When you do kicking or running. Muscle can tear of an avulsion fracture of the ischial tuberosity can occur.
increases coverage of femoral head. Increases articular sutface by 10-20%
O/I of plantaris?
O= superior to the lateral head of gastroc
I= medial side of achilles tendon