MindMap Gallery Muscles of the Back
This is a mind map of the muscles of the back. You can make and share your own mind maps easily. Just try EdrawMind mind mapping software for free!
Edited at 2022-03-11 20:30:16The arm is a complex structure composed of bones, muscles, nerves, blood vessels, and other tissues. Understanding the anatomy of the arm is essential for medical professionals and anyone interested in the human body. Here's an overview of the key anatomical components of the arm.
Discover the intricate anatomy of the pectoral region, including the pectoralis major and minor, and their connections to movements and nerve supply. This detailed exploration provides essential knowledge for students, medical professionals, and fitness enthusiasts interested in the biomechanics and function of chest muscles.
Dive deep into the anatomy of the axilla with our detailed guide, highlighting the complex structure of the armpit and its significance in the human body. Explore the various walls of the axilla, the important blood vessels, nerves like the brachial plexus, and the lymph nodes critical for immune response. This guide is essential for medical students, healthcare professionals, and anatomy enthusiasts interested in the intricacies of human anatomy and the pivotal role of the axillary region.
The arm is a complex structure composed of bones, muscles, nerves, blood vessels, and other tissues. Understanding the anatomy of the arm is essential for medical professionals and anyone interested in the human body. Here's an overview of the key anatomical components of the arm.
Discover the intricate anatomy of the pectoral region, including the pectoralis major and minor, and their connections to movements and nerve supply. This detailed exploration provides essential knowledge for students, medical professionals, and fitness enthusiasts interested in the biomechanics and function of chest muscles.
Dive deep into the anatomy of the axilla with our detailed guide, highlighting the complex structure of the armpit and its significance in the human body. Explore the various walls of the axilla, the important blood vessels, nerves like the brachial plexus, and the lymph nodes critical for immune response. This guide is essential for medical students, healthcare professionals, and anatomy enthusiasts interested in the intricacies of human anatomy and the pivotal role of the axillary region.
muscles of the back
Levator
origin
transverse processes of C1-C4
insertion
dorsal surface of medial border of the scapula from superior angle to the spine
nerve supply
dorsal scapular nerve(nerve to rhomboideus C5)
nerve to levator scapulae from cervical plexus (C3&4)
action
elevates the scapula
tilts the neck to the same side when shoulder is fixed
Rhomboid minor
origin
from the lower part of the ligamentum nuchae , spines of C7-T1
insertion
dorsal aspect of medial border of scapula opposite root of spine
nerve supply
dorsal scapular nerve (nerve to rhomboideus C5)
action
retraction of the scapula
Rhomboid major
origin
thoracic spines of T2,3,4,5
insertion
dorsal aspect of medial border of scapula from spine to inferior angle
nerve supply
dorsal scapular nerve (nerve to rhomboideus C5)
action
retraction of the scapula
Latissimus dorsi
origin
from lower 6 thoracic spines under cover of the trapezius
lumber fascia
posterior part of outer lip of the iliac crest
the lower 3 ribs
the back of the inferior angle of the scapula
insertion
into the floor of the bicipital groove of the humerus
nerve supply
nerve to latissimus dorsi(thoracodorsal nerve) from posterior cord of the brachial plexus
action
adduction,extension and medial rotation of the arm (as teres major) used in swimming
it pulls the trunk towards the arm in climbing and gymnastics with pectoralis major
it assists in deep expiration (cough)
Trapezius
origin
back of the skull
external occipital protuberance
medial 1/3 of superior nuchal line
back of the neck
ligamentum nuchae
spine of the 7th cervical
back of the thorax
all thoracic spines
insertion
upper fibers
into posterior border of the lateral third of the clavicle
middle fibers
into medial border of the acromion of the scapula
lower fibers
into upper lip of the spine of the scapula
nerve supply
motor
spinal part of accessory nerve
sensory
(proprioceptive sensation)from the cervical plexus
actions
upper fibers
elevate the scapula
middle fibers
retract the scapula ( adduction)
lower fibers
depress the scapula
middle and lower fibers
abduction of the arm more than 90 degree (with lower 5 digitations of the serratus anterior
it has triple relation to teres major( it lies behind,below and in front
accessory muscle expiration
the only muscle of upper limb has pelvic attachment
**wasting of the muscles leading to loss the normal lateral slope of the neck with drop shoulder on affected side
N.B : its the only muscle of upper limb : a) arises from the skull b) nit supplied by the brachial plexus