Essays on Innervation

INTRODUCTION

The 12 cranial nerves are olfactory nerve I, optic nerve II, oculomotor nerve III, trochlear nerve IV, trigeminal nerve V, abducens nerve VI, facial nerve VII, vestibulocochlear nerve VIII, glossopharyngeal nerve IX, vagus nerve X, spinal accessory nerve XI and hypoglossal nerve XII . Cranial nerves that transmit information from the brain to the eye are optic nerve, oculomotor nerve, trochlear nerve, trigeminal nerve, abducens nerve and facial nerve. The primary function of the cranial nerves in the eye is innervation of muscles in the eye, control of vision, controlling lateral and vertical movements of eyeball in the eye and ...

Abstract

The research paper deals with the problem of Merkel cell carcinoma, chief peculiarities, and the possibility of medical treatment. Disease signs and symptoms are highlighted in the opening and subsequent paragraphs of the paper. The pathophysiology, etiology, manifestations, possible complications, and disease treatment are the focal point of the research paper. The research is based on the opinions of the finest subject-field experts, such as professors, doctors, and scientists. Keywords: Merkel cell carcinoma, medical treatment, disease, complication, cure Merkel cell carcinoma is an aggressive skin cancer usually caused by polyomavirus. Scientists and doctors have not managed to ...

Introductory Problem One

Concentric muscle action is an action that describes the contraction that involves the shortening of a muscle. Examples of activities where the concentric muscle action is required include walking on level ground, picking up a weight and kicking a ball. The quadriceps and calfs are involved when walking on level ground and when kicking a ball. The biceps, deltoids and back muscles are involved when picking up a weight.

The eccentric muscle action is where a muscle elongates as it being stimulated in order to develop tension. Some of the activities that require eccentric muscle action are extending the elbow where the biceps branchii are ...

1. Motor pathways: Briefly describe important differences between the lateral and the medial (motor) systems

ANSWER:

The motor system is the corticospinal tract. The lateral part of the corticospinal tract decussates while the medial part does not. The lateral corticospinal tract controls limb muscles while the medial corticospinal tract controls the axial and trunk muscles. The lateral corticospinal tract carries contralateral fibers from the cerebral cortex to supply the limb muscles while the medial corticospinal tract carries ipsilateral fibers from the cerebral cortex to supply the axial and trunk muscles.

2. What is the main function of the basal ganglia?

ANSWER:

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