Overall test 3 review Flashcards
(220 cards)
What is the major point of muscle origination on the pubis?
- iliac fossa on the ilium
What occurs at the obturator foramen?
- the obturator forament allows for the passage of nerves and vessels from the pelvis to the thigh
Which muscle is absent in 20% of the population?
- psoas minor muscle (not very relevant)
What is the function of the psoas major?
- to act in the motion of hip flexion, this is the most important flexor muscle of the joint
What is the origin of the psoas major?
– on the transverse process of the lumbar vertebrae in front of the quadratus lumborum
What is the origin for the Quadratus lumborum?
- the inferior aspect of the 12th ribs and to the lateral aspect of the transverse processes
What is the function of the quadratus lumborum?
- when acting in a unilateral motion lateral flexion to the ipsilateral side occurs
- when acting bilaterally extension of the back will occur
- during respiration will act to increase the volume of the thorax to aid in inspiration
What does the subcostal nerve innervate?
- it acts similar to ventral rami, somatic senorsy, somatic motor, and postganglionic sympathetic
Where does the subcoastal nerve exit from?
- it exits just beneath the 12th rib similar to an intercostal nerve
Where does the ilohypogastric nerve innervate?
- it innervates the lateral and anterior thoracic wall and into the thing
Where does the genitofemoral nerve exit the vetebral column?
- it exits at the L1/L2 rami, and runs in front of the psoas major
What is unique about the lateral femoral cutaneous nerve regarding its innervation?
- it does not contain somatic motor units just somatic sensory, not typical ventral rami nerve
Where does the lateral femoral cutaneous nerve exit the pelvis?
- it exits through space under the anterior superior illiac space and over inguina ligament
What is the largest nerve, and what is its function?
- the femoral nerve and it comes from L2-L4 rami, responsible for the motion needed to kick a ball, contains sypical somatic motor, sensory and post ganglionic sympathetics
- also acts in knee extension and hip flexion
Where does the obturator nerve pass?
- through the obturator foramen
What is unique about the sensory innervation of the obturator nerve?
- it stops at the knee
What is the lumbrosacral trunk?
- the connection between lumbar plexus and the sacral plexus and it is the pathway to the sciatic nerve
What are the layers of the anterior abdominal wall from superficial to deep?
- skin
- campers fascia
- scarpas fascia
- 3 layers of muscle
- transversalis fascia
- parietal peritoneum
- abdominal organs
What is the function of the sympathetic trunk?
- to act as the paravetebrbral ganglion
- it is medial to everything
Where is insertion for the rectus abdominus?
- on costal cartilages and the xiphoid process
Do the fibers of rectus abdominus run laterally or vertically? Where are they wider?
- vertical and are wider more superiorly
How many tendinous insertions are there for the rectus abdominus and where are they attached?
- 4 insertions that insert to the superficial divisions of the rectus sheath
Where is the origin of the rectus abdominis and what is its function?
- it originates at the pubis and functions to flex the trunk and aid in forceful expiration
True or false the internal and external oblique muscles’ fibers run in the same direction?
- False they run at right angles to one another