Chapter 6B Study Guide Flashcards
What is the torticollis?
Weakening of the sternocleidomastoid causing tilting of the head
Found in a baby who has wryneck
Which muscles of the head and neck are unpaired muscles?
The platysma, the Orbicularis oris, the frontalis, and the occipitals
What do trunk muscles include?
(1) Those that move the vertebral column
(2) Anterior thorax muscles, which move the ribs, head, and arms
(3) Muscles of the abdominal wall, which help to move the vertebral column and form the muscular “natural girdle” the abdominal body wall
Which muscles are good injection sites?
The deltoid muscles and the gluteus medius
What three groups do muscles of the upper limb fall into?
(1) Muscles that arise from the shoulder girdle and cross the shoulder joint to insert into the humerus
(2) Causes movement at the elbow joint.
(3) Muscles of the forearm
How are forearm muscles named?
Names reflect their activities
All anterior arm muscles cause what action?
Elbow flexion
Muscles of the lower limb cause action on which body parts?
Hip, knee, and foot joints
Why are the origin and insertion interchangeable for lower limb muscles?
Many muscles of the lower limb span two joints and can cause movement at both of them
What do muscles in the lower limb specialize in?
Walking and balancing the body
When can embryonic movement be felt?
16 weeks
What is muscular dystrophy?
A group of muscle destroying diseases that affect specific muscle groups
What is the most severe and common type of muscular dystrophy?
Duchenne’s muscular dystrophy
Who normally develops DMD?
Boys
What age is DMD usually diagnosed?
Between 2 and 7
