Thorax Flashcards
Broadly, what do the posterior rami of the spine supply
Extensor muscles of vertebral canal
Varying degrees, the skin
Which muscles do posterior rami supply
Erector spinae
Tramsversospinalis group deep to thoracolumbar fascia
Levator costae
Splenius (and all muscles deep)
What are the branches of the posterior rami (broadly)
Medial and lateral
In upper body, lateral = muscle, medial to skin
Lower body, lateral = skin, medial to muscle
Which spinal segment has NO cutaneous branch
C1
Which spinal segments reach the skin
All thoracic and all sacral
Which posterior rami supply limbs
NONE !!
Broadly, what does the anterior rami supply
All other muscles of trunk & limbs, skin at sides & front of neck & body
What are the rami of brachial plexus
Anterior rami of C5-8, T1
What rami supply muscles of anterior abdo wall
T7-12
What is the lowest spinal nerve to supply anterior abdominal wall
L1, via iliohypogastric & ilioinguinal nerve
What are the branches of the intercostal nerves
Lateral - side
Anterior terminal - front of body wall
What is the fascia of scarpa
Superficial fascia that slides freely over the underlying thoracic wall, rectus sheath & ext oblique aponeurosis
What does the scarpas fascia continue as, and where does it attach
Continues over penis & scrotum as colles fascia, below thighs attached to fascia lata
Where is campers fascia and where does it end
OVER external oblique muscle
Fades out over upper thoracic wall and along midaxillary line
Blood supply of the body wall
Flanks - intercostal, subcostal & lumbar As
Ventral - internal throacic & superior/internal intercostal arteries
Venous drainage of abdominal wall
Above umbi - latearl thoracic vein, ito axillary
Below umbi - greater saphenous vein
Nerve supply of the body wall
Anterior & latearl branches of ventral rami & smaller degree posterior rami
What makes up the skeleton of thoracic wall
12 TV
12 pairs of ribs
CC
Sternum
Which ribs are free
11, 12
What types of joints are in the thoracic skeleton
Costovertebral joint
Costochondrial joint
Sternocostal joint
Interchondral joint
Costovertebral joint features
Head of rib has 2 articular facets that connects to demifacets of vertebral body
- inferior facet of rib against superior costal facet of its own vertebra
- superior facet of rib against inferior costal facet of vertebra above
Costotransverse joint
Articular facet of rib with tip of transverse process of its own vertebra
What reinforces the costotransverse joint
Lateral cT lig
CT lig
Superior CT lig
Costochondral joint features and joint type
Rib with CC - primary cartilaginous joint