Please enable JavaScript.
Coggle requires JavaScript to display documents.
The Back (Exc. Vertebrae) (Muscles Anatomy (Back region) (Trapezius…
The Back (Exc. Vertebrae)
Spine
White Matter
Mylein Sheath Present
Columnss of white matter
Bundles of nerve fibres
Grey Matter
Spinal Nerves (Typical)
Emerge from intervertebral foramina
Axons emerge grouped separately from spinal cord
Divisions of Rami
Dorsal Primary Rami
Supplys
erector spinae back muscles
Skin
Ventral Dorsal Rami
Supplys
Somatic Muscles of trunk
Limbs
Skin
Nerve cell bodies
Central H-Shape
Divisions of Roots
Nerves leading from Ventral Horns
Combines to form mixed spinal nerves
which come from the intervertebral foramina
Separate into
Dorsal roots
Ventral Roots
Nerves leading from Dorsal Horns
Divisions of the motor neurons
Lower
Ventral Primary cell bodies & Rami
Connects muscles and central nervous system
influenced by
upper motor neurons
Upper
Anatomy and function
Mylein Sheath Not Present
Dorsal Horns
Has cell bodies of sensory neurons
Ventral Horns
Has cell bodies of motor neurons
Constitute Peripheral Nervous system
Vocabulary
Dorsal root
Sensory root
Ventral root
Motor Root
Erector spinae Back muscles
The erector spinae is a bundle of muscles and tendons, is paired and runs vertically.
extends throughout the:
lumbar
thoracic
cervical region
lies in the groove to the side of the vertebral column.
Muscles Anatomy (Back region)
Trapezius
origins
Nuchal lines
quadrupedal animals have thick ligamentum nuchae as it is responsible for lifting head
cervical and upper thoracic spines
Insertions
Lateral ends of the clavicle, The acromion process and spine of scapula
Actions
elevate/rotate scapula
neck extension (if mm fixed)
Keep Shoulders braced (tonus) and suspended upper limb
Injury
Nerve damage results in drooping of shoulders (sternocleidomatoid)
Latissimus Dorsi
Origins
T6-12 spines; lower 3-4 ribs, iliac crest, thoracolumbar fascia (to lumbar and sacral spines), inferior angle scapula
insertion
Humerus (anterior) (intertubercula sulcus)
Actions
Adducts
Extends
Medially rotates arm
Raises body (climbing)
Levator scapulae
Origins
Transverse processes of cervical vertebral spines (C1-C4)
Insertion
Upper Medial Border scapula (above spine)
Actions
Elevation of scapula; tilts glenoid inferiorly
Rhomboid Minor
Origins
Spinous processes of (C7, T1, 2)
Insertion
Medial Border scapula (opposite spine)
Actions
Elevation and retraction of scapula
Rhomboid Major
Origins
Spinous processes of T2-T5
insertion
Medial Border of scapula (below spine)
Actions
retraction/elevation of the scapula
