Flashcards in Week 1 Dermatomes, Myotomes, Joints- Severson Deck (25)
Define dermatome and myotome
Dermatome = unilateral area of skin innervated by the nerve fibers of a single nerve that originates from a single cord segment
Myotome = spinal nerves innervating groups of muscles
dermatome of C5
dermatome of T4
dermatome of T10
dermatome of L5
medial foot/ dorsum of the foot
dermatome of S1
Spinal nerve to upper extremity abductors (deltoid, biceps)
spinal nerve to forearm flexors (biceps, brachioradialis)
Spinal nerve to triceps
spinal nerve to quadriceps
spinal nerve to achilles
What spinal cord segments supplies motor innervation to the intrinsic muscles of the hand?
What spinal cord segments supplies motor innervation to the intrinsic muscles of the anal sphincter
dermatome of C6
thumb (lateral/radial regions of the hand)
dermatome of C7
dermatome of C8
little finger (ulnar/medial regions of the hand)
(together joints) bones are separated by connective tissue which prevents limited movement
type of synarthroses - bones are joined by intervening fibrous tissue
ex: membrane between radius and ulna and joints between skull bones
type of synarthroses- two bones are separated from each other by cartilage which permits very limited movement
Ex: Epiphyseal plate, intervertebral disc, and symphysis
type of synarthroses- two bones are joined together by bone
Ex: frontal bone, epiphyseal plate
Diarthroses/ Synovial Joints have what common features?
-Synovial space: an articular cavity or discontinuity between bones
-Articular surface (smooth surfaces for articulation)
What produces synovial fluid?
What is a bursae?
closed scas or cavities of synovial membrane usually separating bone from overlying tendon of muscle filled with synovial fluid.
-Bursae reduce friction between structures
-communicate with synovial cavity of adjacent joint
Arthritis = inflammation of join
Synoyitis = inflammation of the synovial membrane of joint
Bursitis = inflammation of a bursa