Some COVID-19 patients have presented with peripheral neurological symptoms. Although it is not a common complication of COVID-19, it is worth investigating all possible causes of the neurological symptoms that arise.

Effects of COVID-19 on the Peripheral Nervous System

The autonomic nervous system (ANS) is a subset of the peripheral nervous system. The word "autonomic" describes its role in regulating involuntary and unconscious bodily function, such as heart rate, respiratory rate, and sexual arousal. The system consists of motor neurons (ganglia) and its axonal connections, and is functionally divided into three components:
- sympathetic nervous system
- parasympathetic nervous system 
- enteric nervous system

Autonomic Nervous System

The somatic nervous system is a part of Peripheral Nervous System. It controls the voluntary functions of the body through skeletal muscles. There are two types of nerves in the somatic nervous system: afferent (sensory) nerves and efferent (motor nerves). Afferent nerves relay information from the body to the central nervous system. It primarily relays sensory information like pain. smell, etc. Efferent nerves relay information from the central nervous system to the body. Somatic Nervous System consists of two parts: cranial nerves and spinal nerves. Cranial nerves are responsible for carrying information to and fro from the brain stem. Spinal nerves carry information to and fro from the spinal cord. 

Somatic Nervous System

Affective scientists can measure the peripheral nervous system to make inferences about one's emotional state. For example, they can measure eye movements, blood pressure and volume, heart rate, and electrodermal activities to infer one' emotional states (e.g. fear, anxiety, anger, etc.)

Measuring Emotions Through the Peripheral Nervous System

The peripheral nervous system are all nerve components (nerve, ganglia) outside of the brain and spinal cord. The word "peripheral" describes its function in connecting limbs and organs to the central nervous system. It is functionally divided into two components:
- somatic nervous system
- autonomic nervous system

University of Michigan - Ann Arbor

Smith College

- Brain
- Neurons
- Peripheral nervous system (PNS)
- Neurological diseases
- Central nervous system (CNS)

Focuses of neuroscience (neurobiology) 

Wikipedia

The expanded, front section of the central nervous system located within the skull. It is an incredibly intricate organ made up of billions of interconnected neurons and glial cells. The brain is a bilateral structure, meaning it has two sides, and can be divided into distinct lobes. Each lobe is linked to specific functions, but all parts of the brain work together to underpin our thoughts and behaviors.

Brain

Functioning as the central building blocks and core information processors of the nervous system, neurons are interconnected cells essential for all tasks the system performs. The human brain contains around 100 billion neurons at birth. Their role encompasses everything from simple reflexes to complex cognitive functions.

Neurons

Nervous system diseases affect the brain, spinal cord and nerves. These include structural, biochemical and electrical damages. Below are a few lists of diseases covered in 1Cademy:
- Guillain–Barré syndrome (GBS)
- Encephalopathy
- Anosmia
- Seizures
- Stroke
- Paralysis
- Ageusia

Neurological Diseases

Peripheral Nervous System

The central nervous system consists mainly of the brain and spinal cord.  Messages are relayed between the central and peripheral nervous systems.

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