Lower Extremity (lecture/lab) Flashcards
What Limits Expansion of muscle, increase muscle efficiency, promotes return of Venus blood.
Deep / Investing Fascia
Name the four compartments of innervation
Anterior, Posterior, Medial, Lateral
What is the innervation of the posterior thigh muscles? (Except the short head-biceps femoris)
Sciatic nerve-tibial division OR tibial nerve
The the Iliotibial tract of the fascia lata has a shared aponeurosis with what two areas of the body?
Gluteus Maximus, Tensor Fascial Lata (TFL)
What posterior thigh muscle is the most superficial?
Semitendinosus
What is the action and innervation of the biceps femoris (short head)?
Action: Knee flexion
Innervation: Common fibular division
What is the most posterior of the posterior thigh muscles?
Semimembranosus
List the muscles of the inferior posterior leg from superficial to deep.
Gastrocnemius, Plantaris, Soleus, Popliteus, Tibialis Posterior, Flexor digitorum Longus & Flexor Hallicus Longus
What posterior thigh muscles insert into the pes anserine?
-Sartorius
-Gracilis
-Semitendinosus
Biceps Femoris LH origin
ischial tuberosity
Biceps Femoris LH insertion
head of fibula
Biceps Femoris LH actions
knee flexion
rotation of tibia (when knee is flexed)
Biceps Femoris LH innervation
sciatic nerve tibial division
Biceps Femoris (LH & SH) artery
deep femoral artery
Biceps Femoris SH origin
linea aspera
Biceps Femoris SH insertion
head of fibula
Biceps Femoris SH actions
knee flexion
rotation of tibia (when knee is flexed)
Biceps Femoris SH innervation
common fibular nerve
What muscles contribute to posterior pelvic tilt?
Hamstring, gluteus maximus, adductor Magnus
What is the origin of the hamstrings?
(With exception of the BF short head)
Ischial Tuberosity
What muscles insert at the pes anserine?
(proximal, medial, anterior tibial shaft)
Sartorius, gracilis, Semitendinosus
What arteries innnervate the hamstrings?
Deep femoral artery (proximally) and popliteal artery (distally)
What nerves innervation the hamstrings?
Sciatic nerve, Tibial division [L4-S3] <—Sacral Plexus [L4-S4]
What actions do the hamstrings carry out?
Knee Flexion, Hip Extension (with exception of BF SH)
Insertion of the Semimembranosus
Posterior Medial Condyle (Tibia); Medial Meniscus
What is the insertion of the Biceps Femoris?
Fibular Head
What nerve innervation the Biceps Femoris-SH?
Common Fibular Nerve (Sciatic Nerve [L4-S2], Fibular Division)
What is the origin of the Biceps Femoris-SH?
Linea Aspera
What arteries innervate the quadriceps muscles?
Lateral Femoral Cutaneous Artery<—Femoral Artery
What nerves innervate the quadriceps?
Femoral Nerve [L2-L4]<—Lumbar Plexus [T12-L4]
*What is the insertion of the iliopsoas?
Lesser Trochanter
*What is the origin of the psoas major?
T12 vertebral body; L1-L5 IVD, Vertebral Bodies & Transverse Processes
*What is the origin of the iliacus?
Iliac crest & Fossa; Anterior SI Ligaments
What is the origin of the vastus lateralis?
Femoral greater trochanter & Linea Aspera (upper lateral lip)
What is the role of the tensor vastus intermedius?
Increases the contractile efficiency of the quad muscles
What is the origin of Sartorius?
ASIS
What is the origin of rectus femoris?
AIIS
What makes the rectus femoris different than all the other quadriceps muscles?
Is crosses two joints: both the knee and hip
What is the purpose of the articularis genu?
Pulls suprapatellar bursa out of the way, allowing for complete knee extension
What artery innervates the adductors?
Obturator artery
What nerve innervates the adductors?
Obturator Nerve [L2-L4]<—Lumbar Plexus
Where does the gracilis originate?
Inferior Pubic Symphysis
Where does the pectineus originate?
Superior ramus of pubis
Where does the pectineus insert?
Femoral pectineal line
What is significant about the nerves that innervates the pectineus?
Innervates the femoral nerve 2/3 of the time and the Obturator nerve 1/3 of the time
