A 37-year-old african american female who works on an assembly line of a big automobile company complains about her left shoulder being stiff. there has been no trauma to the shoulder. she is left-handed and has to reach over her head and across the chest at work all the time. abduction and external rotation of the left arm are significantly impaired, internal rotation is possible. the patient holds the arm in an adducted position. the tendons of which muscles are most likely affected?
A. m. supraspinatus and m. infraspinatus
B. medial and posterior part of the deltoid
C. long and short head of the biceps
D. mm. pectorales
E. m. subscapularis and m. teres minor
Answer: A. m. supraspinatus and m. infraspinatus
Anatomy
- The muscle weakness of myasthenia gravis results from
- Which statement about excitation-contraction coupling is incorrect?
- At rest, active sites on the actin are blocked by
- A t rest, the tropomyosin molecule is held in place by
- Which of the following statements about the action potential is false?
- Which of the following interactions between electrical and chemical gradients does not lead to the establishment of a neuron's resting potential?
- The myelin sheath that covers many CNSaxons is formed by
- _____ are the most numerous type of neuron in the CNS.
- Recognized neuronal circuit patterns include all of the following,except:
- The layer of connective tissue that surrounds individual axons within a peripheral nerve is termed the
- The postganglionic fibers that connect an autonomic ganglion in the thoracic or lumbar region with the spinal nerve and contain post ganglionic fibers that innervate glands in the body wall or limbs are:
- The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord and carries visceral motor fibers that are myelinated form the
- The outermost connective- tissue covering of nerves is the
- The white matter of the spinal cord is mainly
- The subdural space lies between
- The ventral root of a spinal nerve contains
- The dorsal root of a spinal nerve contains
- The dorsal root ganglia mainly contain
- Which of these is NOT a function of the meniscus of the knee?
- Which ligament unlocks the knee joint to allow the knee to initiate flexion?
- On the proximal tibia There is cartilage covered areas on the superior surface, This surface is separated by a bony bridge, between the two menisci's, what is this structure called?
- What are the bones of the knee joint?
- What are the synovial joints involved with the Knee joint?
- What is considered the largest most complex synovial joint in the body?
- When it comes to the femur what is the difference between males and females?