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Flashcards in Posterior thigh Deck (25):
1

What are the hamstrings innervated by

Sciatic nerve (L4-S3)

2

What are the muscles in the posterior thigh

Biceps femoris,
Semitendinosus,
Semimembranosus

3

Action of hamstrings

Flexion at knee and extension at hip

4

Origin of biceps femoris

Long head - Ischial tuberosity of pelvis
Short head - Linea aspera on posterior femur

5

Actions of biceps femoris

Knee flexion,
Hip extension,
Lateral rotation at hip and knee

6

Innervation of biceps femoris

Long head - tibial part of sciatic nerve
Short head - common fibular part of sciatic nerve

7

Origin of semitendinosus

Ischial tuberosity of pelvis

8

Attachment of biceps femoris

Head of fibula

9

Attachment of semitendinosus

Medial tibia

10

Actions of semitendinosus

Knee flexion,
Hip extension,
Medial rotation at hip and knee

11

Innervation of semitendinosus

Tibial part of sciatic nerve

12

Origin of semimembranosus

Ischial tuberosity of pelvis (more superiorly than others)

13

Attachment of semimembranosus

Medial tibial condyle

14

Action of semimembranosus

Knee flexion,
Hip extension,
Medial rotation at hip and knee

15

Innervation of semimembranosus

Tibial part of sciatic nerve

16

Posterior thigh muscles are more commonly known as

Hamstrings

17

What muscle has a hamstring portion

Adductor Magnus

18

What is a hamstring strain

Excessive stretch or tearing of muscle fibres in hamstrings, often seen in sports injuries (running and kicking)

19

Likely consequence of hamstring strain

Rupture of surrounding blood vessels producing a haematoma, which is contained by overlying fascia lata

20

Treatment of hamstring strain

RICE
Rest, ice, compression and elevation

21

What's an avulsion fracture

Fragment of bone breaks away from main body of bone

22

Cause of ischial tuberosity avulsion fracture

Sports requiring rapid contraction and relaxation of hamstrings (sprinting, football and hurdling)

23

What is an avulsion fracture of the ischial tuberosity

Hamstring tendons tear off piece of ischial tuberosity

24

Treatment of ischial tuberosity avulsion fracture

Difficult to heal. May require surgery

25

Grades of hamstring strains

Grade 1 - over stretching without tearing muscle
Grade 2 - partial tear
Grade 3 - severe/complete rupture (visible lump may be present)

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