Posterior Thigh

where does the posterior thigh region extend from

gluteal region—→ popliteal fossa

what are the actions of the hamstring muscles

• hip extensors, knee flexros depending on what joint it crosses

what innervates the hamstring muscles

sciatic nerve (apr L4-S3)

semitendinosus O I A

O; ISCHIAL TUBEROSITY

i: PES ANSERINUS

A: extension of thigh, knee flexion, medial rotation of leg

semitendinousus is innervated by what nerve ?

tibial nerve

pes anserinus is attatchment of what 3 muscles from 3 different regions

1. sartorius

2. gracillis

3. semitendinousus

semimembranosus O,I, A

deep to semi tenin

O: ischial tuebrosity

I: posterior aspect of medial tibial condyle

A: thigh extension, knee flexion, medial rotation of leg

semi memb innervated by what

tibial nerve (L4-S3)

Biceps femoris long head

O: ischial tuberosity

I: LATERAL ASPECT OF FIBULA

A: thigh extension, knee flexion, lateral rotation of the leg

bicep fem long head innervated by….

tibial nerve

3 first muscles of the hamstring group all originate where and by what nerve

semi tend, memb, long head

ischial tuberosity, tibial nerve (L4-S3)

short head of bicpep fem (does not cross hip joint) O,I,A

O: POSTERIOR ASPECT OF SHAFT OF FEMUR

I: LATERAL ASPECT OF HEAD OF FIBULA

A: knee flexion, latral rotation

whats short head of bicep fem innervated by

common fibular n.

The person is lying supine with one hip flexed. They are using a stretching ring/band to assist in applying controlled force through three planes:

Position A

• Hip flexion

• Knee extension

• Slight hip adduction

• Position B

  • Hip flexion

  • Knee extension

  • Hip in neutral alignment

  Position C

  • Hip flexion

  • Knee extension

  • Hip abduction

  A — Hip slightly adducted across midline

  ➡ Stretches the posterolateral thigh / iliotibial band complex

  • Tensor fascia lata

  • Iliotibial band

  • Gluteus medius/minimus (posterior fibers)

  Also mild hamstring tension remains because the hip is flexed + knee extended.

  ---

  B — Hip in neutral (straight up)

  ➡ Primary stretch = Hamstrings, especially:

  • Semitendinosus

  • Semimembranosus

  • Biceps femoris (long head)

  This is a classic straight-leg hamstring stretch.

  ---

  C — Hip taken into abduction

  ➡ Stretches medial thigh / adductor group

  • Adductor longus

  • Adductor brevis

  • Gracilis

  • Adductor magnus

  You may also stretch pectineus depending on angle.

is there any artery in the posterior thigh

none.

what is posterior thigh innervated by

again, sciatic nerve splitting into tibial and fibular nerve

TIBIAL: L4-S3

common fibular nerve: semi memb short head

dermatomes that overlie posterior thigh region

L2-S3

SENSORY INNERVATION TO POSTERIOR THIGH

PFCN (S1-S3)

lateral cutaneous nerve of thigh (l2-l3)

if hamstring strain is severe enough, what can happen

avulsion fracture pulling a piece of ischial tuberosity

identify