Abstract
Proper posture in the active female is maintained by a complex interplay between both the musculoskeletal system and neurological system. Together, these systems utilize various anatomical and physiological components such as bones, musculature, the neuromuscular junction, action potentials, reflex arcs, and the motor cortex to control the curvature of the spine. With increasing age, both females and males tend to accumulate postural deficits that can be due to muscular imbalances or bone changes like osteoporosis. Such debilitating changes often lead to pain, muscular atrophy, and injuries. Yet, these postural changes can be prevented and/or mitigated with proper physical exercise programs and therapeutic modalities. Prior to beginning a postural correction regimen, one’s baseline spinal curvature should be assessed using methods such as the flexicurve ruler and bubble inclinometer. Understanding the underlying causes of poor posture in addition with how to assess and prevent its negative repercussions are paramount to maintaining an active lifestyle well into a female’s elderly years.
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Chapter Review Questions
Chapter Review Questions
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1.
What are the proper vertebral levels at which to measure the degree of kyphosis using the bubble inclinometer and what range of measurement is considered hyperkyphotic?
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(a)
C7/T1 and T12/L1; >40°
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(b)
T1/T2 and T12/L1; <40°
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(c)
T1/T2 and L1/L2; >40°
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(d)
T1/T2 and T12/L1; >40°
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(a)
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2.
Which of the following exercises promotes thoracic extension and specifically involves contraction and strengthening of the upper back musculature?
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(a)
Bird dogs
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(b)
Banded rows
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(c)
Wall tilts
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(d)
Bodyweight squats
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(a)
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3.
Which of the following correctly describes the components of a motor unit?
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(a)
Motor neuron and skeletal muscle fibers innervated by that motor neuron
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(b)
Motor neuron and neuromuscular junction (NMJ)
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(c)
Neuromuscular junction (NMJ) and skeletal muscle fibers innervated by that NMJ
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(d)
Motor neuron and muscle spindle
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(a)
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4.
Which of the following is an example of an electrical-to-chemical signal transduction?
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(a)
Presynaptic neuron → postsynaptic neuron
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(b)
Motor neuron → neuromuscular junction (NMJ)
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(c)
Sensory mechanoreceptor → afferent sensory nerve
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(d)
Acetylcholine (ACh) → nicotinic acetylcholine receptor (nAChR)
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(a)
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5.
Which of the following factors are involved in contributing to postural deficits in individuals?
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(a)
Age
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(b)
Gender
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(c)
Muscular imbalances
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(d)
All of the above
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(a)
Answers
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1.
d
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2.
b
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3.
a
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4.
b
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5.
d
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Kharbat, A.F., Ha, F.L.X., Zumwalt, M., Robert-McComb, J.J. (2023). The Importance of Posture and Muscular Balance in the Body for Managing Skeletal Muscle Injuries in Active Females. In: Robert-McComb, J.J., Zumwalt, M., Fernandez-del-Valle, M. (eds) The Active Female. Springer, Cham. https://doi.org/10.1007/978-3-031-15485-0_13
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