Which muscles of the rotator cuff cannot be easily seen
subscapularis because it is on the ventral surface of the scapula and we are looking from the posterior aspect.
What are the actions and innervation of the rotator cuff mucles ?
Supraspinatus
- inn:suprascapular nerve
-Action:Abduction of the arm at the shoulder
think supra man how he flies the first thing he has to do is abduct his arms
Infraspinatus
-inn: suprascaular nerve
-action: lateral rotation of the arm at the shoulder
Tere minor:
-inn: axillary nerve
-action: Lateral rotation of the arm at the shoulder
Subscapularis
-inn:upper and loer subscapular nerve
action:medially rotate arm at the shoulder
Think "All me for the actions"
What is the innervation and action for the teres major?
innervation:lower subscapular
action:adducts and medially rotates the arm
Imagine getting arrested for a major office. how do the cops get you. The adduct you hand and medially rotate them . remember that medial rotation is toward the back
MAJOR offence
What is at the end of the spinal cord and where does it end ?
The conus medularis and between vertebrae L1-L2
How do you differentiate the ventral and dorsal root of the spinal cord ?
The denticulate ligament. it is 21 pairs of ligament that span from the foramen magnum to S2. it is an outgrowth of the pia mater. it has tooth like triangular projections that pierces through each layer of the meninges of the spine.
Memngieal sheets. ensurea that the spinal cord is connected to the dura mater.
What type of cell bodies are found in the dorsal root ganglion? in the ventral horn of the spine ?
for the dorsal root ganglion you find sensory cell bodies. for the ventral horn there are motion cell bodies
What do the ventral and dorsal rami innervate ?
dorsal innervated the epaxial muscles of the body
ventral innervates the hypaxial muscles of the body
in terms of somatic motor innervation
what are the unique features of the cervical vertebrae?
short spibous processes that are often bifurcate
small bodies
large vertebral foramina
only vertebrae type with transverse foramamina;foramen in the transverse process
superior and inferior articular facets are oriented horizontally
Unique characteristics of Thoracic vertebrae
long spinous processes that point inferiorly
transvers costal facets for articulation with the rib
demifacets on the superior and inferior aspect of the body/pedicle for rib articulation
superior and inferior aritcular process that are parralel to the coronal plane
Lumbar vertebrae unique features
Large vertebral bodies
broad spinous processes that project posteriorly
no transverse costal facetsor demifacets
superior and inferior articular processes parralell to sagital plane
Through which opening does eaxh spinal nerve leave the VT?
through the intervertebral foramen.. This is created by two adjecent vertebrae. their inferior and superior notches and the intervertebral disc
Latissimus dorsi movements
ARE you kidding you dont know?
Adduct, medial rotate, and extend the arm at the shoulder
Deltoid muscle
flexes, abduct, and extends
supra spinatus
abduct arm
TRapezius
extends head and neck, laterally flexes head and neck
elevates and retracks shoulder and depresses at pectoral girdle